When Elias Keyes Jr. was born on 22 July 1719, in Shrewsbury, Worcester, Massachusetts Bay Colony, British Colonial America, his father, Elias Keyes, was 24 and his mother, Keziah S Brigham, was 21. He married Sarah Trull on 15 April 1741, in Shrewsbury, Worcester, Massachusetts, United States. They were the parents of at least 1 son and 1 daughter. He died in May 1756, in New Marlborough, Berkshire, Massachusetts, United States, at the age of 36, and was buried in Marlborough, Middlesex, Massachusetts, United States.