I like space names for alien kids, and if I knew I had a pair of male twins coming, Pollux and Castor (from the constellation Gemini) would be awesome.
Rhyming names are funny in cartoons (Donald Duck's nephews Huey, Louis, and Dewey, or Popeye's nephews Peepeye, Papeye, and Poopeye) but otherwise more tacky, than clever.
For a Sims game, anything goes though, and it would be hecka fun to have 3 triplet daughters who are vampires, named for the Three Furies, so Alekto, Tisiphone, and Megaera. They would of course, not be nice girls.