Dillon
Gender: Mostly Boy
Meaning: Like a lion, faithful
Origin: Irish Gaelic/Welsh
Popularity: Ranked #930 in 2025 with 253 babies born.
History: Dillon may derive from the Irish surname 'Ó Duilleáin' or from a Welsh word meaning faithful. It became popular in the United States in the late 20th century, boosted by the TV character Marshal Matt Dillon of Gunsmoke.
Name length: 6 letters
How common is Dillon? About 1 in 11,321 babies born in 2025 were named Dillon, or roughly 0.8 per day in the United States.
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Frequently asked about Dillon
What does the name Dillon mean?
Dillon means “Like a lion, faithful” from Irish Gaelic/Welsh roots.
What is the origin of the name Dillon?
Dillon has Irish Gaelic/Welsh origin. The traditional meaning is “Like a lion, faithful”.
How popular is Dillon?
Dillon ranked #929 in 2025 — given to 253 babies that year.
When was Dillon most popular?
Dillon peaked in 1992 with 5,063 babies registered that year.
Is Dillon a boy or girl name?
Dillon is predominantly a boys' name — over 90% of Dillons in registered births are male.
Is the name Dillon rising or falling in popularity?
Dillon has risen 1795 spots in the rankings over the last 5 years — from #2724 in 2020 to #929 in 2025.
How long has Dillon been recorded?
Dillon appears in birth records across 116 years — from 1892 through 2025.