When Keith Lloyd Mount was born on 20 August 1903, in Kimberly, Piute, Utah, United States, his father, Lloyd Fletcher Mount, was 21 and his mother, Martha McKree Lawson, was 21. He married Mabel Cooley on 11 October 1924, in Orange, Orange, California, United States. They were the parents of at least 2 sons and 1 daughter. He immigrated to United States in 1931 and lived in Mina, Mineral, Nevada, United States in 1920 and Hawthorne, Mineral, Nevada, United States for about 1 years. He died in May 1982, in Carson City, Nevada, United States, at the age of 78.
English (Kent and Lancashire): either a topographic name from Middle English mont, munt ‘mount, hill’, or a habitational name from any of the many minor places so called, such as Mount in Elham (Kent).