Killian is a distinctive boys' name in United States, ranking #936 in 1997 with 145 recorded births. The name reached its all-time peak in 2017 with 1,505 births ranking #248. In 1997, approximately 1 in every 13,001 boys born was named Killian. FALLING Recent data shows the name is currently falling.
Killian is a modern-feeling Irish-rooted name that is often connected with the same family as Cillian. It has a strong sound and a smoother international look than some more obviously Gaelic spellings.
The name became more visible through anglicised use and modern chart popularity, especially outside Ireland. It keeps a Celtic identity while feeling very accessible.