In 711 one Visigoth ruler seemingly named to the Umayyad Muslims to aid in his battle against a rival. (Which just one is unclear, because the historic information for this period in Spain are scarce and you can find by way of example no up to date Muslim sources by https://spaintravelagency01223.activosblog.com/26338252/a-simple-key-for-spain-travel-agency-unveiled