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First name origin & meaning:

Greek: Beaver

First name variations: Caster, Castorio, Kastor, Kaster

Last name origin & meaning:

English: habitational name from places called Caistor, in Lincolnshire and Norfolk, Caister in Norfolk, or Castor in Cambridgeshire, all named with Old English cæster ‘Roman fort or town’.

This name appears in the following lists: Animals, Saints