Most common surnames starting with K

According to the 1940 census, King was the most common last name beginning with the letter 'K', followed by Kelly and Kennedy. Click on the names below to learn more about their meaning, history and origins.

Surname Rank*
King 1
Kelly 2
Kennedy 3
Kelley 4
Knight 5
Keller 6
Klein 7
Kramer 8
Kane 9
Kline 10
Kirk 11
Kirby 12

* Based on population in the 1940 U.S. Census