How common is the last name Brennan?

47,806 people in the United States have the last name Brennan, about 1 in 6,252. It ranks #697 of 156,621 last names in the 2020 Census.

last name

BRENNAN

#697

of 156,621 last names recorded in the 2020 Census

People
47,806
About
1 in 6,252
This common or more
35.6%
Who bears it

Of the 47,806 people with the last name Brennan, 91.7% reported their origin as White, 3.4% as Hispanic or Latino and 2.9% as two or more races. These count how people described themselves on the 2020 Census, not where the name comes from.

Either side of Brennan

#695 Ware · 47,874#696 Rich · 47,823#698 Dillon · 47,767#699 Cline · 47,748

Spelled almost the same

8 last names in the 2020 Census spelled within a letter or two of Brennan, most common first.

#2,315 Brannon · 15,360#5,120 Brannan · 6,615#5,830 Brenneman · 5,712#8,263 Brannen · 3,841#13,598 Breneman · 2,134#22,823 Brennen · 1,152#30,002 Branan · 836#38,939 Brannam · 611

Also a first name

As a first name, Brennan ranks #1,225 of 53,615, with 31,223 people. As a baby name it peaked in 2009, with 1,550 births. See Brennan as a first name

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