Gracious
Jansel is a modern variant of Jan, which is a Germanic and Dutch form of John. It ultimately derives from the Hebrew name Yochanan, meaning 'God is gracious'. While rare, it follows the trend of adding diminutive or rhythmic suffixes to classic roots.
Less common today
Jansel isn't in the latest US Top 1000. It last peaked at #5,936 in 2011.
Professional baseball pitcher
US births per 5-year period, 1990βpresent (SSA data).