Gracious
A modern phonetic variant of Janice, which itself is an elaboration of Jane. It ultimately derives from the Hebrew name Yochanan, meaning 'God is gracious', and has been used in various forms across English-speaking countries since the mid-20th century.
Less common today
Janece isn't in the latest US Top 1000. It last peaked at #5,316 in 1992.
US births per 5-year period, 1990βpresent (SSA data).