Some characteristic forenames: Spanish Jose, Juan, Manuel, Carlos, Luis, Jesus, Jorge, Miguel, Francisco, Mario, Pedro, Raul. Portuguese Joao, Paulo, Ligia, Vasco, Wenceslao, Armanda, Fernandes.

Galician, Portuguese, and Jewish (Sephardic): topographic name from castro ‘castle, fortress’ (from Latin castrum ‘fort, Roman walled city’), or a habitational name from any of various places called with this word. See also De Castro .

Italian and Jewish (from Italy): topographic name for someone who lived by a fortification, from castro ‘fortification’ (see 1 above) or a habitational name for someone from the town of Castro, the center of a Duchy in Lazio (destroyed after its occupation by Papal military forces in 1649). Compare Lo Castro .