What does Kirwen mean?
Kirwen is an uncommonly occurring first name for men. Kirwen is an equivalently unusual last name too for all people. (2000 U.S. Census)
Kerwin is the only popular alternative form of Kirwen (#unlisted). Adoption of these boy names was at its highest during 1960-1969 (usage of 0.036%) and is now less. Below is a graphed comparison of the popularity of the boy name Kirwen and associated names. (Top 1000 Birth Names Records, 2014)