Isaia is a ♂ male name.
Isaia is an Italian variant of the biblical name Isaiah, which is an English form of the Hebrew name Yesha’yahu / יְשַׁעְיָהוּ.
Isaia means “Yahweh is salvation” (from “yeho/יְהוֹ” = referring to the Hebrew God + “yasha’/יָשַׁע’” = to save).