Castor Family History
Castor Surname Meaning
French, German, Spanish, and West Indian (mainly Haiti): from the Latin personal name Castor borne by one of the Greco-Roman mythological Dioscuri twins (the other being Pollux) and by several early Christian saints (see Kastor).
English (Nottinghamshire): habitational name from any of the places called Caistor in Lincolnshire, Caister in Norfolk, or Castor in Northamptonshire, all named with Old English cæster ‘Roman fort or town’.
German: humanistic surname, a translation into Latin of Biber, from castor ‘beaver’.
Americanized form of German Kaster.
Source: Dictionary of American Family Names 2nd edition, 2022
