What does the name Theanna mean? The meaning of the name Theanna is Gracious, Merciful. The origin of the name Theanna is American. This is the culture in which the name originated, or in the case of a word, the language.
Alternate spellings: Teanne
People who like the name Theanna also like: Thea
, Roxanne Gunner
Name Notes: Form of Anna or a combination of the names Theo and Anna.