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Home › Baby Names Directory › Dillan

Dillan

♀ Girl

Pronounced DIL-un /ˈdɪl.ən/High

Meaning: A spelling of Dylan — from the Welsh, 'son of the sea; a great tide/flow'; more often a boys' name; here for a girl; we note the crossoverLow

In 30 seconds: Son of the sea; a great tide: Dillan spells Dylan. Crisp, modern, and warm. More often a boys' name — here a girl.
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Origin LowWelsh
MeaningA spelling of Dylan — from the Welsh, 'son of the sea; a great tide/flow'; more often a boys' name; here for a girl; we note the crossover
U.S. rank (2025)#10312 ↘ Falling
2025 U.S. births9 girls (0.00% of U.S. girls)
Peak year2003
Total births (all-time)≈ 393

Popularity in the U.S. · SSA data

peak 200319932025

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Dillan is a spelling of Dylan — from the Welsh, 'son of the sea; a great tide/flow' (we note the crossover). More often a boys' name, it is recorded here for a girl — which we flag honestly (slug distinguished; said 'DIL-un').

In the U.S. Dylan/Dillan is chiefly a boys' name; this girls' use is unusual. Rare for a girl, son-of-the-sea at the root, and crisp.

Did you know? Dylan is Welsh for 'son of the sea; a great tide' — Dillan is a spelling, more often a boys' name; here for a girl, which we note (said 'DIL-un').
Overall data confidence 30%
References — Dylan — Welsh; chiefly male

Variations

DylanDillonDyllan

Nicknames

Dill

Famous Bearers

  • Famous bearers coming soon.

If you like Dillan…

Dylan— the standard spelling
Dillon— a kin spelling
Dylann— a fellow girls'-leaning spelling
Delaney— a sound-adjacent D- girls' name

Explore names like Dillan

By themeuncertaincross-sexwelsh

All themes →All meanings →All origins →

Frequently Asked

What does the name Dillan mean?

Dillan spells Dylan — Welsh 'son of the sea; a great tide'. It is more often a boys' name; here it is recorded for a girl.

How do you pronounce Dillan?

It's said DIL-un /ˈdɪl.ən/ — two syllables, stress on the first.

Is Dillan a boy or girl name?

Dillan is chiefly a boys' name; this page covers its use as a girl's name.

How popular is Dillan?

Dillan is uncommon for boys and very rare for girls.

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