Gift of God
Mattix is a modern American coinage, likely derived as a phonetic variant of Maddox or a creative diminutive of Matthew. It shares the etymological roots of Matthew, which comes from the Hebrew name Mattityahu. The name has gained some traction in recent years due to the popularity of 'x' endings in masculine names.
Less common today
Mattix isn't in the latest US Top 1000. It last peaked at #3,112 in 2012.
US births per 5-year period, 1990βpresent (SSA data).