My 15-yr-old sister is named
Geneva. I think it's lovely, and prefer it to
Genevieve. I like how the stress is on the long e rather than the "GEN." Also, I like the sound of "NEEV" more than "VEEV"
I have 4 brothers named
Riley (family name),
John,
Samuel, &
Gregory.
As to
Vaughn, I fall in the save-the-male-names camp, so I'm not a fan of feminizing it.