Gift of God; lake or waterfall
A modern American compound name combining Matti (a diminutive of Matthew or Martha) with the popular suffix -lynn. It blends the Hebrew roots of Matthew, meaning 'gift of God', with the Welsh-derived 'lynn', referring to a body of water.
Less common today
Mattilynn isn't in the latest US Top 1000. It last peaked at #5,279 in 2014.
US births per 5-year period, 1990βpresent (SSA data).