boy name
Killian
Gender
Boy
Popularity
#418 · U.S. boys (2025)
Popularity of Killian in the US, 1880–2025
Killian first appears in US records in 1915. It peaked in 2017, when 1,506 boys were given the name; in 2025 there were 770.
Source: US Social Security Administration.
Frequently asked questions
Is Killian a boy or a girl name?
Killian is most commonly used as a boy name.
How popular is the name Killian?
In 2025, Killian ranked #418 among boys’ names in the United States, according to U.S. Social Security Administration data.
When was the name Killian most popular?
Killian was most popular in 2017, when about 1,506 US babies were given the name that year, according to US Social Security Administration records.