What does "porgy" mean?

Porgy: (a) The scup. (b) The sailor's choice, or pinfish. (c) The margate fish. (d) The spadefish. (e) Any one of several species of embiotocoids, or surf fishes, of the Pacific coast. The name is also given locally to several other fishes, as the bur fish. [Written also porgee, porgie, and paugy.]