Jannice is a female name with English origin. It is pronounced as JAN-is (/dʒæn.ɪs/). One variation of this name is Janice. Jannice has been given to newborns in the United States since at least the early 20th century, although it saw its peak popularity in the mid-20th century. While it has declined in usage over the years, Jannice still remains a beautiful and timeless choice for parents looking for a classic name for their baby girl.