Calista - don't mind it; wouldn't use it.
Bethany - very tired; prefer
Bethan or Betsan.
Elena - doesn't happen where I live. I'd happily use
Helen.
Susanna - prefer
Susannah and would use it.
Carissa - where I live, it's a thorny shrub.
Tabitha - very nice except for the likelihood of
Tabby; prefer
Talitha.
Christiana - two of my great-grandmothers were
Christiana, both called
Chrissie. I'd consider it as a mn, but probably wouldn't use it, not being religious at all.
Cameron (for a girl) - doesn't happen here; I still laugh.
Silas - starts with a sigh and ends with an ass. No.
Simeon - too close to simian.
Titus - pretentious.
Walter - very nice except for
Wally.
Nicholas - very nice indeed.
Jasper - a 19th-century music-hall villain, twirling his moustaches and planning the heroine's downfall.
Moses - a one-owner name, like
Elvis and
Errol. Also shortens to
Mo, as does
Mohammed, so there could be interesting misunderstandings.