Seamus \se(a)-mus\ as a boy's name is pronounced SHAY-mus. It is of Irish origin. Variant of James (Hebrew) "he who supplants". "Shamus" is sometimes used as an American slang for a private detective. Poet Seamus Heaney.

Seamus has 3 variant forms: Seumas, Seumus and Shamus.

For more information, see also the related name Jacob.

Baby names that sound like Seamus are Semmes, Syms, Simms and Symms.