Where does “Alcala” come from?

Alcala comes from Spanish Alcalá, from Arabic qalʿa meaning fortress or citadel.

Ancestry of “Alcala”, step by step

Step	Language	Word	Meaning
1	Spanish	Alcalá	—
2	Arabic	قلعة	fortress, fort, castle; distancing oneself,...
3	Arabic	قَلْعَة	citadel, fort; fortress, fort, castle; fort,...