Dillan means son of the sea or great tide — the double-L variant of Dylan, from the Welsh. Same Welsh-sea-son, double-L calligraphy. Two syllables of the Welsh sea-son through double-L flowing distinction.
son of the seagreat tidedouble-LDylanWelshseaflowingwarmvisual weightheritage
◎
Origin & history of Dillan
Welsh dy (great) + llanw (tide)→double-L Dillan
1
Welsh / Irish roots
Dillan IS the double-L variant of Dylan meaning son of the sea.
2
First recorded
Earliest known use: Double-L variant.
3
Today
Dillan remains a beloved choice, ranking #2276 in the US. 7,350 babies have been named Dillan since 1975.
◈ Sources: Behind the Name, SSA data
◆
How popular is Dillan?
1992peak year
Dillan first appears in the U.S. registration record in 1975. Its popularity climbed over the following decades. In 1992, 341 babies received the name (ranked #553). Today it sits well outside the top 1,000 (around #2276), with roughly 78 babies named Dillan each year. Dillan has been declining in recent years. In total, around 7,350 babies have been registered with this name since 1880.
Year-by-year registrations1880–2024 · U.S. Social Security data
Dillan's Life Path 5 is the adventurer's number — sea adventure. People named Dillan tend to be warm, flowing, and gifted at double-L Welsh sea-son distinction.
Every name has a homeland. Discover strong boy names rooted in cultures from around the world — each with full meanings, origin stories and pronunciation.