What does Dermot mean?
Dermot /der-mot/ as a boys' name is of Irish and Gaelic origin, and the meaning of Dermot is "free man". Actor Dermot Mulroney.
How popular is Dermot?
Dermot is a rare given name for men. Dermot is also a unique last name for all people. (2000 U.S. Census)
Popular varying forms of Dermot (not ranked) are Jeremiah (#56 2 years ago) and Kermit. Adoption of these forms of Dermot was at its highest during 1900-1909 (average #394) and is somewhat lower today (#528, 22.1% less), with the form Kermit becoming less fashionable. Jeremiah is the longstanding favorite. Below is a graphed analysis of the popularity of Dermot and related names. (Top 1000 Baby Names Records, 2014)