Interesting, I just learned the literal meaning of Matamoros as in Matamoros, Mexico.

The name "Matamoros" is derived from Spanish, combining "matar" (to kill) and "moros" (Moors), thus literally translating to "Moor killer." This term is historically associated with Saint James, known in Spanish as "Santiago Matamoros," who, according to legend, appeared during battles in medieval Spain to aid Christian forces against Muslim Moors.