Killian is a distinctive boys' name in England & Wales, ranking #638 in 2024 with 59 recorded births. The name reached its all-time peak in 2022 with 79 births ranking #492. Since 1996, the popularity has increased by 490.0%. In 2024, approximately 1 in every 4,708 boys born was named Killian. FALLING Recent data shows the name is currently falling.