Castor — Family Name, Records and Arms

Castor is easy to measure, thanks to official name counts.

• Spanish register data show 90 residents carrying Castor as first surname, and 52 as second surname. Each Spaniard has two surnames, so the same name is counted once as first and once as second surname. 6,063 Americans were listed as Castor in the 2010 census.
• We don't publish a meaning for Castor without a reliable source. Our researchers work it out from the records of each family.
• Spelling in old records was loose, so search for Castor under several forms.
• Similar-sounding surnames on Herald Lab: Castro.

Family crest and blazon

If a Castor family bore arms, our report explains whose they were and what the blazon shows. Research your Castor family history with a full surname report and painted coat of arms.