When Benedict Swingate Calvert was born on 27 January 1722, in Walsingham Abbey, Norfolk, England, his father, Charles Benedict Calvert, 5th Baron Baltimore, was 22 and his mother, Petronilla Melusina Von der Schulenburg Countess Of Walsingham, was 28. He married Elizabeth Calvert in 1748. They were the parents of at least 10 sons and 4 daughters. He died on 9 January 1788, in Prince George's, Maryland, British Colonial America, at the age of 65, and was buried in Saint Thomas Episcopal Church Cemetery, Croom, Prince George's, Maryland, United States.
English (northern): occupational name from Middle English calfhirde, from Old English (Anglian) calf ‘calf’ + hierde ‘herdsman’.
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