Researching John Brennan
Dig into the past of John Brennan using the links below. We hope you find this information useful!
![]() | Did you know that in the 1881 UK census there were 3128 people with the Brennan surname? In that year Brennan was ranked number 1307 for popularity in the UK. |

The name John means "God is gracious" and is of Hebrew origin.
Records of John Brennan on Ancestry
Ancestry is a major source of information if you are filling out the detail of John Brennan in your family tree. With over 30 billion records and 100 million family trees to search, Ancestry is one of the key websites to visit to help you trace your family tree back in time. Free trials are normally available and are a good way to fill out a lot of your tree quickly.
| Country Collection | |
|---|---|
![]() |
Ancestry.com Global records search results for John Brennan. |
![]() |
Ancestry.com US records search results for John Brennan. |
![]() |
Ancestry.co.uk UK records search results for John Brennan. |
![]() |
Ancestry.ca Canadian records search results for John Brennan. |
![]() |
Ancestry.com.au Australian records search results for John Brennan. |
DNA
Sometimes you can run into a brick wall in your tree and you just don't have enough evidence to make that next step back in time. A DNA test can sometimes help to make a link to a particular family name if you find you share common DNA with people who have the same or similar surnames as each other. If you are lucky then you may get a match within a few generations and discover some Brennan ancestors. Additionally, the modern DNA test can give you a breakdown of your ethnic mix - you may be surprised at the results!
Have you reached a brick wall in your Brennan Tree?
Birth, Death and Marriage Records for John Brennan and the Brennan Family Tree
Birth, Death and Marriage records are often the best method of making the links to the Brennan Genealogy that will form part of your family tree. Although records vary from country to country, they are normally the most formal record of a person's relations. From the sources listed below it will be possible to locate a birth record and, from that record, a birth certificate may be obtainable which is likely to list the names of the parents, therefore taking you back another generation. A marriage certificate may also list the names of the respective fathers of the bride and groom which may then help you to find them earlier in life on a census record enabling you to fill out more detail in the Brennan family tree.
Study Parish Records for John Brennan at Find My Past.
Study for the UK registered births, marriages and deaths of John Brennan using the FreeBMD database.
Investigate Genealogy Bank for John Brennan records.
Search MyHeritage for John Brennan information.
Explore the LDS Database for records about John Brennan.
Research the Brennan surname using fold3 Military Archives and view images of original Brennan Military records.
![]() | Did you know that there are currently 15516 people with the Brennan surname in the UK? Brennan is now ranked number 359 for popularity in the UK. |
Brennan Genealogy Databases
Another way to build your tree quickly is to use the research other people have already done. This can help to confirm or refute your own deductions - however, be wary of taking this data at face value as other researchers may not have been as meticulous as you. Always try to back up deductions with some definitive sources rather than relying too heavily on others.
Check out the WikiTree database for user contributed records for John Brennan.
Study MyTrees for information on the Brennan family and people looking to contact living Brennan relations.
Study One Great Family for Brennan records submitted by people who are already researching the Brennan Family Tree.
Find John Brennan from Ireland on findmypast.ie
Brennan Forums
There are a number of forums which are dedicated to rearching particular surnames. These can be good places to share your findings and also to tap into the knowledge that others may already have. These can sometimes be a good way of finding living relations as these tend not to show up on the other sources of information for privacy reasons.
Research the Brennan surname using Genealogy.com forums .
![]() | Did you know that there are currently 48612 people with the Brennan surname in the USA? Brennan is ranked number 141 for popularity in the USA. |
Miscellaneous Brennan Databases
Search the Ellis Island Database for information on John Brennan. This database contains over 25 million immigration records detailing passengers arriving in the United States of America.
Some Famous People called John Brennan
John Brennan (CIA officer)
John Owen Brennan (born September 22, 1955) is a former American intelligence officer who served as the Director of the Central Intelligence Agency (CIA) from March 2013 to January 2017. He served as chief counterterrorism advisor to U.S. President Barack Obama, with the title Deputy National Security Advisor for Homeland Security and Counterterrorism, and Assistant to the President. Previously, he advised Obama on foreign policy and intelligence issues during the 2008 election campaign and presidential transition.
Brennan withdrew his name from consideration for Director of the Central Intelligence Agency (CIA) during the first Obama administration over concerns about his support for torture, after defending on TV the transferring of terror suspects to countries where they might be tortured while serving under President George W. Bush. Instead, Brennan was appointed Deputy National Security Advisor, a position which did not require Senate confirmation.
Brennan's 25 years with the CIA included work as a Near East and South Asia analyst, as station chief in Saudi Arabia, and as director of the National Counterterrorism Center. After leaving government service in 2005, Brennan became CEO of The Analysis Corporation, a security consulting business, and served as chairman of the Intelligence and National Security Alliance, an association of intelligence professionals.
Brennan served in the White House as Assistant to the President for Homeland Security between 2009 and 2013. Obama nominated Brennan as his next director of the CIA on January 7, 2013. The ACLU called for the Senate not to proceed with the appointment until they confirmed that "all of his conduct was within the law" at the CIA and White House. Brennan was approved by the Senate Intelligence Committee on March 5, 2013, to succeed David Petraeus as the Director of the CIA by a vote of 12 to 3.
On August 15, 2018, President Donald Trump announced that he had revoked Brennan's security clearance, although the White House reportedly did not follow through with the revocation process. Brennan had harshly criticized Trump several times since his election and responded to the revocation by stating "My principles are worth far more than clearances. I will not relent."
Brennan serves as a senior national security and intelligence analyst for NBC News and MSNBC. His inaugural appearance was on Meet the Press with Chuck Todd on Sunday, February 4, 2018.
Source: John Brennan (CIA officer), Wikipedia, The Free EncyclopediaJohn Calder Brennan
John Calder Brennan (November 19, 1908 – February 6, 1996) was a Laurel, Maryland historian.
A member of the class of 1930 at The Citadel, where he majored in English and History, Brennan retired as a personnel specialist for the Federal Reserve. He was a Laurel resident for more than 50 years and wrote a column on history and etymology for the Laurel Leader newspaper in the 1960s and 1970s. Considered a Booth scholar, Brennan wrote the article "John Wilkes Booth's Enigmatic Brother Joseph", published in the Spring 1983 issue of Maryland Historical Magazine. Also among Brennan's works is The Three Versions of the Testimony in the 1865 Conspiracy Trial, published in 1983 and cited in the book Blood on the Moon: The Assassination of Abraham Lincoln. The Laurel Museum's research library is named after Brennan, whose works are among its major holdings. A World War II veteran who served as a Major in the U.S. Army Air Corps, Brennan is interred at St. Lawrence Cemetery in Sumter County, South Carolina.
Source: John Calder Brennan, Wikipedia, The Free EncyclopediaJohn Joseph Brennan
John Joseph Brennan (1913–1976), usually known as John Brennan, was a Northern Irish politician. He stood for the British House of Commons in Belfast West at the 1959 UK general election, representing the Independent Labour Group, receiving 37.6% of the vote.
In 1962 he stood for the Belfast Falls constituency at the 1962 Northern Ireland election, before becoming a founder member of the National Democratic Party.
Under the National Democratic banner, Brennan won Belfast Central at the 1965 Northern Ireland election without facing an opponent - the only member of that party to win election at this level.
However, at the 1969 Northern Ireland election, he was defeated by Paddy Kennedy of the Republican Labour Party.
Source: John Joseph Brennan, Wikipedia, The Free EncyclopediaJohn Brennan (Irish senator)
John J. Brennan (1901 – 6 August 1977) was a draper and publican, a Fianna Fáil politician and a member of Seanad Éireann from 1960 to 1977.
He was from Clontibret in County Monaghan and was active in the Old IRA during the Irish War of Independence. He was elected to the County Council in 1942. In Castleblayney, he was chair of the urban district council and president of the chamber of commerce. He stood unsuccessfully for Dáil Éireann in Monaghan in the elections of 1948, 1954, and 1957. He was a friend and early political backer of Erskine H. Childers, Monaghan TD and later President of Ireland.
He was elected to the 9th Seanad on 9 February 1960 at a by-election to the Administrative Panel caused by the death of John O'Leary. He was elected to the 11th (1965) and 13th (1973) Seanad from the Industrial and Commercial Panel, and was nominated by the Taoiseach to the 10th Seanad in 1961 and to the 12th Seanad in 1969.
Source: John Brennan (Irish senator), Wikipedia, The Free EncyclopediaOther names that sound a bit like Brennan
Family names can get corrupted over time, particularly where literacy was not as good. The following list contains some names that have similar sounds so you may want to also look at one or two of the more likely possibilites.
Baerman Barmaimon Barman Barnam Barnham Barning Barningham Barnum Bauermann Bearman Beermann Behrman Behrmann Berman Bermingham Bernham Bernin Bernine Berninger Bernini Bernon Bernondos Berriman Berryman Berumen Bierman Biermann Birmingham Birnum Boarman Boorman Boreman Borman Bornamann Borneman Bornheimer Bornman Borrowman Bowerman Braiman Brainen Braman Bramham Bramont Branam Branaman Branen Branham Branin Brannam Brannan Branneman Brannen Brannin Branning Branninger Brannon Brannum Branom Branum Branyan Branyon Brauman Brauninger Brayman Braynion Breeman Bremen Breming Bremond Breneman Brenenstahl Brennand Brennans Brenneman Brennen Brennenstuhl Brenning Brennon Brienen Brimham Brimingham Brimman Brimming Bringham Brining Brininstool Brinning Broennimann Bromaghim Broman Bromham Bromont Bromund Bronnenkant Broughman Brownen Browning Bruening Bruineman Bruinemann Brumaghim Bruman Brumana Brumen Brumham Brummund Bruneon Bruning Brunini Brunnemer Brunnen Brunnenkant Brunning Brunon Brunone Brymham Bryning Brynnink Buerman Buermann Buhrman Buranen Burman Burmann Burmingham Burnaine Burnam Burnand Burneman Burnham Burnhams Burning Burningham Burnman Burnum





Comments
Looking for information on a John Brennan in your family tree? Why not post a question here -