Boy’s name · Irish, German

Kilian

How to say it: KIL-ee-uhn · /ˈkɪliən/

From Irish Cillian, possibly meaning 'church' or 'strife' - name of 7th-century missionary saint.

Kilian was the 265th most popular boys’ name in the United States in 2025, given to 177 babies (Social Security Administration). The 2020s are its busiest decade so far, its births are up about 25% in ten years, and it is projected to rise to #244 by 2030.

Updated · SSA 2025 data, published May 2026 · Insee 2025 data, published July 2026 · How we compute these figures

#265for boys in 2025
1 in 2,321US babies
177born in 2025
#244projected for 2030
2020sits peak decade
1 in 97chance a classmate shares it

Key facts

Key facts about Kilian
Rank among boys’ names, 2025#265
Babies born in 2025177
Share of births1 in 2,321
Peak decade2020s
Change over 10 years+25%
Projected rank for 2030 (estimate)#244
In France, 2025#258 among boys’ names, 10 births

Sources: Social Security Administration (SSA), Insee (France). How we compute these figures.

Its life, decade by decade

Kilian belongs to the last forty years, with almost no earlier use. The 2020s mark its high point, and momentum points upward from here.

1900195020002020–25
Peak: 104 per million births, 2020s.

What goes with it

Soft yet crisp to the ear, with three lilting beats and a strong undercurrent. Tristan makes a natural companion, and Kil works as a short form.

In the classroom

In a class of 25 children born in 2025, the chance that another child is called Kilian is about 1 in 97.

Around the world

This spelling is used in Czech, Danish, English, French, German, Irish, Norwegian, Polish, Swedish.

In France: #258 for boys in 2025.

Famous people named Kilian

From Wikidata and Wikipedia

Good to know

  • KILIAN PARIS luxury perfume house founded by Kilian Hennessy; reads as a brand name in fashion-aware circles

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