Matthias \m(a)-tthias\ as a boy's name is pronounced ma-THYE-us. It is of German, Greek and Hebrew origin, and the meaning of Matthias is "gift of God". Biblical Greek form of Mattathia (see Matthew). Biblical: the disciple selected by lot to replace Judas as an apostle. Mathias is a Scandinavian and Welsh form; Matias is Spanish. German painter Matthias Grunewald.