I was serving the net late last night and came upon a Bible genealogy (I was looking for the name Abiram in people's family trees they put online). In it Dodo was mentioned as a male name (http://snipurl.com/8bnv). My own New International Bible lists Dodo as well, in Judges 10:1.
Doda could be a femininisation. Or it could be from David, but I don't know.