Well I can tell you that kids will make anything out of anything that rhymes..
I have Ruby: Ruby duby doo... Ruby booby, Rubes... Ruby Rooster. Ruby red dress...
Finnian: Finny bin bin... Finny bin laden (redface insert), Finny binny bo bo boy...
Lucy: Luce as in Loose.. Lucy Lu. Lulu,
Eva: Eva Beaver. Evie Keneevee... Evil Keneeval (Sp), Evil Janice (her middle name is Janice).
Imogen: Immy, Dim Sim, etc etc

Fidel has a gorgeous meaning... I think it is funky & cool... It gets a thumbs up from me!