"Blend of Katie and Ann"
The name Katieann is commonly a female name.
Katieann is a modern American compound of the given names Katie and Ann, written together without a space or hyphen. Katie is an English pet form of Katherine, and Ann is the standard English form of the name carried in the Hebrew Bible by the mother of Samuel. Joined spellings of this kind appear in United States birth records from 1970 onward.
The pronunciation of Katieann is KAY-tee-an.