God has been gracious
Jaxsin is a modern phonetic spelling of Jackson, which originated as an English surname meaning 'son of Jack'. The name Jack itself is a medieval diminutive of John, a name of Hebrew origin meaning 'God has been gracious'.
Less common today
Jaxsin isn't in the latest US Top 1000. It last peaked at #3,768 in 2015.
US births per 5-year period, 1990βpresent (SSA data).