Meaning and name origin
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.
For more information, see also the related boy name Jacob.
Seamus is not a popular first name for males and an equally uncommon surname or last name for all people (2000 U.S. Census).
Displayed below is the baby name popularity of the name Seamus for boys. Seamus reached its highest rank of #735 in the U.S. in 2003. (2014 statistics).
Displayed below is a comparison of the popularity of the boy name Seamus and its variant forms. Popular variation forms ranked in the Top 1000/100 are Jacob (#4), James (#9), Seamus (#900) and Shamus. (2014 statistics).