When Hoyt Guernsey was born on 3 February 1804, in Schenectady, Schenectady, New York, United States, his father, Chauncey C Guernsey, was 30 and his mother, Lucy E Hoyt, was 24. He married Iola Denison on 7 December 1826. They were the parents of at least 3 sons and 2 daughters. He died on 8 December 1834, in Poultney, Rutland, Vermont, United States, at the age of 30, and was buried in East Poultney Cemetery, Poultney, Rutland, Vermont, United States.
English (southern): habitational name from the island of Guernsey in the Channel Islands. The name of the island is from the Old Norse ey ‘island’, with an uncertain first element, perhaps the male personal name Grani in the genitive case with original -ar, or from a genitive case form of grǫn ‘pine’. This surname is now rare in Britain.