Meaning of the surname Mejía
Mejía is a Spanish surname of the religious type meaning "Messiah". It is one of the 200 most common surnames in Mexico. Origin traditionally linked to converts; etymology uncertain.
About this meaning. The etymology is uncertain or the popular reading is folk etymology. The page gives the best-supported explanation.
Given at baptism or taken from the church calendar: Cruz (cross), Santos (saints), de la Cruz, Santiago, Reyes (kings, for Epiphany), Trinidad, Guadalupe.
In Mexico a person carries two surnames, the father's and then the mother's, so Mejía appears as either half of a pair: Mejía García, López Mejía. Read how the two-surname system works.