Where does “Salazar” come from?

Salazar (English) comes from Spanish Salazar, from Spanish sala, from Basque zahar, from Proto-Basque *za(h)ar.

Ancestry of “Salazar”, step by step

Step	Language	Word	Meaning
1	Spanish	Salazar	—
2	Spanish	sala	room; large hall; ward
3	Basque	zahar	old, aged
4	Proto-Basque	*za(h)ar	—