I'm not fond of it - while obviously it won't sound that way to a native Greek speaker, I can't help but think "dork ass". I do like the meaning "gazelle" though!
Some middle names:
Dorcas AnastasiaDorcas CorneliaDorcas EleanorDorcas FredericaDorcas GwendolynDorcas IsadoraDorcas LorettaDorcas MalloryDorcas NatashaDorcas TheodoraDorcas Veronica