The sources checked do not record Yonni as a personal name or give it a meaning.
Affection
Cute
White, Gray, Brown, Black
Any Size
Unisex
Hebrew
Y
5 Letters
A term used in some cultures meaning 'blessing' or 'gift'
Diminutive of Gabrielle, and a short form of Gabriel or Gabriella
Finnish, from Swedish husse, "master"