Gracious
Jonis is a rare variant of Jonas or John, ultimately derived from the Hebrew name Yochanan. It signifies the belief that God has been gracious or has shown favor. While uncommon in the United States, it appears in various European cultures as a regional diminutive or phonetic variation.
Less common today
Jonis isn't in the latest US Top 1000. It last peaked at #9,320 in 2003.
Greek professional footballer
US births per 5-year period, 1990βpresent (SSA data).