FIRST NAME
Cillian
Cillian is the 4,092nd most common male first name in the United States, recorded for 1,377 men and boys in the latest Census. It is also given to 33 women and girls.
AS A MALE NAME · #4,092 TODAY
2020 CENSUS
1,377
living · #4,092
BABIES NAMED CILLIAN BY BIRTH YEAR · 1995–2025
2025595
As a male name, Cillian peaked in 2024, when 668 babies were named Cillian (the #463 male name that year).
SOURCE: SOCIAL SECURITY ADMINISTRATION (US BIRTHS)
AS A FEMALE NAME · #40,178 TODAY
2020 CENSUS
33
living · #40,178