Eri Hubbard Day is recorded as "Evi H. Day" in the death record's index for Wexford County, Michigan. Eri's parents are recorded as, "Evi R." & Unk. should be Russell Day and Levena Hubbard.
Caroline Straight Mattoon Rogers in 1922 wrote a "Genealogy of the Descendants of David Simmons." She relates a Caroline S. Simmons who married in Ross Township, Kalamazoo County an Arthurton R. Day, "son of Eri and Lavena _____Day."
Arthurton was a son of Russell Day and Lavena Hubbard, and a brother of Eri Hubbard Day.
Eri Hubbard Day's son Henry Eri Day had a farm in Boon Township, Wexford County near Cadillac.
I sent for some land records for Henry Day. They were for a different Henry Day, a son of George Day who is related through Robert Day the immigrant from England.George Day is a descendant of Thomas Day. Russell Day, Eri Day, and Henry Day are descendants of John Day. Henry Day married Minnie Simons. Henry's land records are at the Archives of Michigan. I'll get them.