When Isaac Ralph Gerow was born on 24 December 1882, in Hodgdon, Aroostook, Maine, United States, his father, Wellington A Gerow, was 39 and his mother, Elvira A Moody, was 34. He married Elizabeth J Howard on 1 January 1907, in Cary, Aroostook, Maine, United States. They were the parents of at least 1 son. He lived in Cary, Aroostook, Maine, United States in 1910 and Littleton, Aroostook, Maine, United States in 1920. He died on 14 April 1955, in Houlton, Aroostook, Maine, United States, at the age of 72.