Reiersen Family History
Reiersen Surname Meaning
Norwegian: patronymic from the personal name Reier from Old Norse Reitharr from reith ‘house home’ + -arr representing a proto-Norse form -harjar ‘warrior’
-warjar ‘defender’ or -gairar ‘spear’. Compare Reierson Rierson and Ryerson.
Source: Dictionary of American Family Names 2nd edition, 2022