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Dillion
Pronounced DIL-ee-ən /ˈdɪl.i.ən/High
Meaning: -ion spelling of Dillon/Dylan — from an Irish surname (possibly 'like a lion'), and/or Welsh Dylan, 'the great tide, the sea'; routes layeredLow
Popularity in the U.S. · SSA data
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
Dillion is an -ion spelling of Dillon/Dylan — from an Irish surname (possibly from a root meaning 'like a lion', or a Norman name), and/or the Welsh Dylan, 'the great tide, the sea' (the legendary sea-child of the Mabinogion; routes layered, which we note). A crisp, strong, modern name; the -ion styling personalizes it (nickname Dill).
It registers thinly beside Dillon. Rare, like-a-lion-or-the-sea at the root, and strong.
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Frequently Asked
What does the name Dillion mean?
Dillion spells Dillon ('like a lion', Irish) and Dylan ('the great tide, the sea', Welsh); the routes are layered.
How do you pronounce Dillion?
It's said DIL-ee-ən /ˈdɪl.i.ən/ — three syllables, stress on the first.
Is Dillion a boy or girl name?
Dillion is a boy's name.
How popular is Dillion?
Dillion is a rare spelling in the U.S.; Dillon is more common.