Where come from the last name San Martin?

Question:

Where come from the last name San Martin?

Best Answer - Chosen by Asker: San Martin

Spanish (San Mart㭮, also Sanmart㭮): habitational name from any of the numerous places so named for a local shrine or church dedicated to St. Martin.

Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4

("habitational" means where they live. Other last names, like "Carpenter", are from the work they do.)