WDYT of Sula?
It used to be used a little bit in the US, more than 100 years ago.
https://www.behindthename.com/name/sula/top?submitted=yesCould be a diminutive of
Ursula? - I don't know.
Seems to have been most popular near the peak of
Lula's popularity though.
Can you imagine it as a rediscovered baby name today?