When Hans Peter Alexander Davidsen was born on 22 August 1855, in Vor Frue, Copenhagen, Denmark, his father, Morten Davidsen, was 40 and his mother, Kristin Hansdatter, was 30. He married Sophia Hansen on 23 August 1878, in Copenhagen, Denmark. They were the parents of at least 1 son and 2 daughters. He lived in Copenhagen, Copenhagen, Denmark for about 10 years and Copenhagen, Denmark in 1880. He died on 8 December 1881, in Salt Lake City, Salt Lake, Utah, United States, at the age of 26, and was buried in Salt Lake City Cemetery, Salt Lake City, Salt Lake, Utah, United States.