The first name Mattia is ♀ female and ♂ male.
Mattia is an Italian form of the name Matthias or Matthew, which derived from the Hebrew name Mattityahu / מַתִּתְיָהוּ. In Italy, Mattia is a masculine name, in other countries it is a feminine name.
Mattia means “gift of Yahweh” (from Hebrew “mattath” = gift) (from Hebrew “mattath/מַתָּת” = gift + “yah/יָה” = referring to the Hebrew God).