what nationality does the last name san juan come from
San juan Name Meaning. Spanish (also Sanjuan): habitational name from any of the numerous places so named for a local shrine or church dedicated to St John (San Juan). Source: Dictionary of American Family Names Â©2013, Oxford University Press.ou can see how San juan families moved over time by selecting different Census years. Census records can tell you little-known facts about your ancestors such as birthplace, occupation and value of personal estate. Find out where people with the family name San juan lived before coming to the United States.