Status name meaning "townsman, burgher, citizen" in Middle English, derived from Old English port "port, harbour" (from Latin portus) and mann "person, man".
Americanized form of German Portmann, as well as a Dutch variant of Poortman (and in some cases an Americanized form). A famous bearer is the Israeli-born American actress Natalie Portman (1981-), original name Natalie Hershlag, who adopted her paternal grandmother's maiden name as her stage name.