The name Rommie is short for Andromeda and in this instance comes from the TV series Andromeda.

Andromeda is the starships artificial intelligence of the starship Andromeda Ascendant. Rommie is the ships avitar played by Lexa Doig

Rommie is also the spiral galaxy M31 (Messier Object 31) [NGC 224] and from Greek Mythology:

Rommie is the mother of Asgard and is one year older. Both cats came from STARescue and have now settled in very well.