Son of Maud
A modern creative spelling of Madison, which originated as an English surname meaning 'son of Maud'. Maud is a Germanic form of Matilda, meaning 'mighty in battle'.
Less common today
Madysin isn't in the latest US Top 1000. It last peaked at #4,262 in 2006.
US births per 5-year period, 1990βpresent (SSA data).