Einstein

It's also a German habitational name from any of various places called with a Middle High German derivative of einsteinen ‘to enclose or surround with stone’. In the unsettled social climate of the Middle Ages even relatively minor settlements were commonly surrounded with stone walls as a defense against attack.
Check the websites
https://en.m.wikipedia.org/wiki/Einstein_(surname)
https://www.ancestry.com/name-origin?surname=einstein
https://en.wikipedia.org/wiki/Einstein_family
https://www.familysearch.org/en/surname?surname=einstein
https://discover.23andme.com/last-name/Einstein
https://forebears.io/surnames/einstein
https://www.familyeducation.com/baby-names/name-meaning/einstein