I remember watching a show about Tasmia and Jasmia!
The first syllables of
Dante and Donte sound sliiightly different in my accent. Like
Danny and
Donny - also an excellent pair of murderous brother names I might say ;) But you're right, way too similar.
I really like
Gloria and
Gretchen. Lydell and Laycelle are actually super neat too. But for boys? Well, ok.