Susannah Eve is very pretty indeed, and
Eve Susannah would be too.
I think it's fine. People get named
Lilith and
Delilah, after all! I've known several
Eve people, and they've all been as well adjusted as anyone else.
I had an aunt named
Eva. Once, on one of my brave days, I asked my grandmother how they'd arrived at the name and she explained that
Eva was their first child, so it seemed appropriate, and they also liked the fact that it didn't shorten to anything - she and my granddad both went by nns. At that point, my aunt came into the room and offered us tea. Without blinking, my gran said "Ooh yes, thank you,
Eve". Heroically, I didn't laugh. But I'm certain she was never
Evie!