I've been doing some genealogy work lately, and I just learned that one of my father's aunts was named Delfina (sister to Bibiana, whom I previously knew about). My dad was unusually old for someone my age (he was born in 1930; I was born in 1990), so information about his family was often murky. What do you think of Delfina? I'm quite enchanted by it.
As for combos, I think my favorite is Delfina Rosemary (also a family name). Some others:
Delfina Caroline
Delfina Iris
Delfina Lillian
Delfina Judith
Delfina Blanche
Delfina Beatrice (also a family name, on both sides [Jewish and Italian])
Delfina Sibyl
Delfina Amy (my mom's name)
Delfina Maud(e)