What does Mordecai mean?
Also possibly "follower of Marduk, a god of the Babylonians". Biblical name. In the Talmud, the name is of Aramaic origin, from "mara dachya" meaning "pure myrrh", the aromatic resin which was used in incense.
How popular is Mordecai?
Mordecai is a rare given name for men but a very popular surname for both adults and children (#29325 out of 150436, Top 19%). (2000 U.S. Census)
Below is a charted analysis of the popularity of Mordecai and related names. The only prominent varying form of Mordecai (outside Top 1000) appearing in the Top 1000 is Mordechai. This boy name reached the top of its popularity in 2003 (usage of 0.038%) and is now less widespread. (2014 Birth Statistics)