I personally like both spellings of
Susannah equally - I'm more used to seeing it with the H (and it makes it look more complete and a little more feminine, but
Susanna has a subtle sweetness too). And I like them paired with different names, for example I like
Susannah Blythe best but prefer
Susanna Margaret. Which do you prefer? Reasons why would be lovely.
More specifically, if for you it depends on pairings, which works better in a group (siblings or just stylistically)
Susannah /
Susanna Martha Eliza
Susannah /
SusannaRufusArthur Edmund
Susannah /
SusannaMargot Greta
"The secret garden is always open now. Open, and awake, and alive. If you look the right way, you can see that the whole world is a garden."