What does Iago mean?
Iago /ia-go/ as a boys' name is of Spanish, Welsh and Hebrew origin, and the meaning of Iago is "he who supplants".
Variant of James. 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".
How popular is Iago?
Iago is an unusual given name for men. Iago is an unusual surname too for all people. (2000 U.S. Census)
Jacob (#4 a year ago), James (#9), Santiago (#115), Diego (#129) and Jame are the prominent alternative forms of Iago (unlisted). These forms of Iago reached the apex of their popularity in the year 2009 (usage of 0.76%) and are almost as common today (usage 0.75%, down 0.8%). James has been the most prominent, though Jacob is currently more frequently used. Displayed below is an analysis of the popularity of the boy name Iago and corresponding names. (Top 1000 Baby Names Records, 2014)