When May Sevier was born on 16 January 1867, her father, John Tintruff Sevier, was 35 and her mother, Abigail McGee, was 30. She married David Calvin Carnahan Sr. on 5 January 1888, in Cannon, Tennessee, United States. They were the parents of at least 1 son and 3 daughters. She lived in Ellis, Texas, United States in 1935 and Justice Precinct 4, Ellis, Texas, United States in 1940. She died on 8 March 1946, in Milford, Ellis, Texas, United States, at the age of 79, and was buried in Milford, Ellis, Texas, United States.