When William Otis Feier Sr. was born on 30 August 1864, in Holt, Ingham, Michigan, United States, his father, William Feier, was 41 and his mother, Margaret Baisler, was 41. He married Alta Louise Smith on 5 September 1888, in Okemos, Ingham, Michigan, United States. They were the parents of at least 3 sons and 3 daughters. He died on 31 May 1937, in Alaiedon Township, Ingham, Michigan, United States, at the age of 72, and was buried in Lansing, Ingham, Michigan, United States.