Surname statistics for Brennan

There are approximately 27,659 people named Brennan in the UK. That makes it the 343rd most common surname overall. Out of every million people in the UK, approximately 438 are named Brennan.

Frequency Comparisons
TotalRankFrequency %Per million people
Great Britain
United Kingdom (current)27659343N/A438
United Kingdom (1881 census)312814430.01104
Change since 1881+24531+1100+0.034+334
Other Countries
United States48296642N/A179


People with the surname Brennan are slightly less likely to be politicians than the average member of the population. When they do become politicians, they are most likely to be elected as Labour.

As of the most recent set of elections, the political parties represented by politicians called Brennan are:

  1. Labour (5)
  2. Conservative (1)
  3. Liberal Democrat (1)
More stats for the politics nerds!

Top male forenames

John Brennan
Michael Brennan
Paul Brennan
James Brennan
David Brennan
Mark Brennan
Patrick Brennan
Stephen Brennan
Peter Brennan
Anthony Brennan
Kevin Brennan
Martin Brennan
Robert Brennan
Christopher Brennan
Thomas Brennan
Andrew Brennan
Sean Brennan
Richard Brennan
Timothy Brennan
Daniel Brennan

Top female forenames

Susan Brennan
Sarah Brennan
Margaret Brennan
Patricia Brennan
Mary Brennan
Elizabeth Brennan
Ann Brennan
Karen Brennan
Julie Brennan
Angela Brennan
Janet Brennan
Helen Brennan
Caroline Brennan
Michelle Brennan
Jacqueline Brennan
Linda Brennan
Anne Brennan
Fiona Brennan
Amanda Brennan
Kathleen Brennan


  • Total is the total number of people with that surname.
  • Rank is the position in the list of names ordered by total (eg, a rank of 1 means that it's the most common name, and a rank of 10 means it's the tenth most common, etc).
  • Frequency is the percentage of people with that surname.
  • Per million people is the number of people with that surname per million of the population.

All of these are approximate figures, and the current figures especially so. The 1881 census figures are correct for what was recorded on the census, but we don't really know how accurate it was. At least, though the 1881 figures won't change, as it's a snapshot of a point in time. The current figures, by contrast, are variable according to births, deaths, migration and marriages, so the values shown here are only a best approximation to whatever was the case when the underlying data was collated and will not be the same as whatever the values are right now.

'N/A' indicates that we don't have data for this name in that country or time (usually because it's quite uncommon there and our stats don't go down that far). It doesn't mean that there's no-one there with that name at all!

For less common surnames, the figures get progressively less reliable the fewer holders of that name there are. This data is aggregated from several public lists, and some stats are interpolated from known values. The margin of error is well over 100% at the rarest end of the table!

It's possible for a surname to gain in rank and/or total while being less common per million people (or vice versa) as there are now more surnames in the UK as a result of immigration. In mathematical terms, the tail has got longer, with a far larger number of less common surnames.