Main country
United States
68,331 people
48.1% of total
Surname
Brennan
142,163 worldwide · 115 countries
142,163
Total population
115
Countries
1 in every 56,977
Frequency
Rarity
Common
Dispersion
Global
Top countries
1
United States
68,331
48.1%
2
Ireland
21,976
15.5%
3
England
19,478
13.7%
4
Australia
14,858
10.5%
5
Canada
7,954
5.6%
World distribution
Loading map...