Meaning and name origin
Iago \i(a)-go\ as a boy's name is of Spanish and Welsh origin. Variant of James (Hebrew) "he who supplants". Santiago, the Spanish name for Saint James, was given to several geographical places in South America and the capital city of Chile. Literary: name of the villain in Shakespeare's "Othello".
Iago 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 a comparison of the popularity of the boy name Iago and its variant forms. Popular variation forms ranked in the Top 1000/100 are Jacob (#4), James (#9) and Santiago (#115). (2014 statistics).