Janissa is a feminine name with English origins. It is pronounced as juh-NIS-uh (/dʒəˈnɪsə/). The name Janissa is a variation of the names Janice and Janessa. In terms of popularity in the United States, Janissa has been given to a small number of newborn girls in recent years. While it may not be as common as other names, Janissa carries a unique charm and can be a wonderful choice for parents looking for an uncommon yet beautiful name for their baby girl.