I have obtained copies of CA census records showing my great-grandfather Robert Thornton Utman (b. 20 Jan 1895, CA) to be the son of Lorenzo Dow Utman (b. Sep 1847, NY) whose father was born in NY according to the 1900 record, and Canada according to the 1910 and 1920 records.
I have a copy of a 1870 NY census showing Lorenzo Dow Utman married to Nancy Utman in June of that year in Orleans County, NY.
I believe my ancestor Lorenzo Dow Utman is the same Lorenzo Dow Utman you have listed as the son of Isaac Utman. I would like to share information to see if this is true.