"Variant of Joanna"
The name Yoanna is commonly a female name from the "English" origin.
Yoanna is a spelling variant of Joanna, the English form of Greek Ioanna, which in turn renders the Hebrew name Yochanan. The initial Y is a transliteration of the Greek iota, the same convention that produces Y- spellings in other European languages. The name first appears in United States birth records in 1980.
Joanna means "God is gracious".
The pronunciation of Yoanna is yo-AN-uh.