When William H Wallace Trego was born in March 1837, in Newtown, Bucks, Pennsylvania, United States, his father, Edward Trego, was 24 and his mother, Sarah Fenton, was 25. He married Sarah Ann Bennett on 23 September 1861, in Pennsylvania, United States. They were the parents of at least 1 son and 2 daughters. He lived in New Hope, Bucks, Pennsylvania, United States in 1860. He died about 1916, in Newtown, Bucks, Pennsylvania, United States, at the age of 79, and was buried in Newtown Cemetery, Newtown Township, Bucks, Pennsylvania, United States.