Alfred was the son of David MOON (b.03/31/1802 in Va.; d. unknown) and Sarah (b.1823 in Pa.; d.08/06/1895 in Pine Twp., Mercer Co., Pa.). They had 10 children including Alfred. Alfred's father David was the son of Georg MOHN (b. abt.1759 in Pa.; d. 09/26/1856 in Pine Twp.) and Ruth Ann MARTIN (b. 12/27/1773 in Va.; d. 1862 in Pine Twp). Georg and Ruth Ann had 12 children including David.