When Harmon Franklin Lehew was born on 3 November 1887, in Texas, United States, his father, Richard Pinkney Lehew, was 34 and his mother, Mary Jane Herndon, was 30. He married Lillie Georgia Dyer on 5 December 1908, in Hood, Texas, United States. They were the parents of at least 1 son and 3 daughters. He lived in Kemp, Kaufman, Texas, United States in 1920 and Terrell, Kaufman, Texas, United States in 1930. He died on 12 May 1951, in Terrell, Bibb, Georgia, United States, at the age of 63, and was buried in Terrell, Kaufman, Texas, United States.