Duncan vs Billy

Baby Name Comparison — 2026

Duncan

Boy #1,104 Most Popular 2 Syllables

"dark warrior"

Origin: Scottish Gaelic

Scottish Irish British American

✓ All Clear

Boy #1,051 Most Popular 2 Syllables

"resolute protector"

Origin: Old German via Norman French

English American Australian Irish

✓ All Clear

Duncan Rank #1,104

Billy Rank #1,051

Billy is more popular, ranked #1051 vs #1104 for Duncan.

Is Duncan or Billy more popular?

Billy is more popular, ranked #1051 compared to Duncan at #1104 in the United States.

What do Duncan and Billy mean?

Duncan means "dark warrior" (Scottish Gaelic origin). Billy means "resolute protector" (Old German via Norman French origin).

Are Duncan and Billy boy or girl names?

Duncan is primarily a boy name. Billy is primarily a boy name.