Handy hint: if you get the mother doped up enough for the birth you can pretty much name the child whatever you want.
Handy hint #2: "Sinnertwin" is an entirely appropriate name for both girls and boys that your wife will love when she sobers up. "Slayride" also has a certain charm - maybe if you have twins.
Handy hint #3: don't follow any of the above advice.
Anyway, you might be able to get away with Magnus for a boy. Leo, from Leo Convoy. Maximus at a stretch, as long as you sold it as a better-sounding 'Max'.
Minerva might pass for girls.
Alternately, look to the voice actors: Peter or Cullen would probably fly.