I noted that you had Alice M. Sherman listed as a spouse.
I believe she was his sister. If you note on the headstone (David and Marie Sherman are on the opposite side) it lists "their children".
William and Irwin were David's step-children Earl D. and Alice M. were their children.
Earl D. Sherman's wife(Edith Hapeman) died in 1969 and I don't believe he married after that. See his obit below. It does not list another wife. However, it does list a sister, Alice Boyd. Also, they made an error in listing his wife as Mary Hapeman rather than Edith Hapeman.
Rhinebeck NY Gazette Thursday, November 2, 1972 Elizaville: Earl D. Sherman, 71, a resident of this community, died Oct. 26, at Northern Dutchess Hospital, Rhinebeck. Born in the Town of Red Hook, Dec. 20, 1901, he was the son of David and Marie (Irwin) Sherman. He was a Navy veteran of World War I. His wife the former Mary Hapeman, died in July 1969. Mr. Sherman retired six years ago as a machinist for the Staatsburg Tool Co. He was superintendent of the Elizaville Cemetery. A charter member of the Elizaville Fire Company, Mr. Sherman also was a member of the Widow's Son Masonic Lodge, Livingston and the Elizaville United Methodist Church. Surviving are: a brother, Irwin Sherman, Slingerlands; a sister, Mrs. Alice Boyd, Elizaville, and several nieces and nephews. The Widow's Son Lodge conducted a Masonic Service Oct. 27 at the Burnett and Rockefeller Funeral Home, 42, W. Market St., Red Hook. Funeral services were Oct. 28 at the Elizaville United Methodist Church. The Rev. Glen Myers officiated. Burial was in the Elizaville Cemetery, with military rites conducted by the Red Hook Post, VFW honor guard.
Irena J Brown brith date incorrect Birth date listed on her cemetery page is incorrect. See photos of her grave marker attached to the page to calulate correct birth-year .... birth year should be 1857. Daughter of Weston Thomas and Sarah Spencer and born in Town of Saugerties, Greene County NY, she may be found in 1860 US Census as Reyna J Thomas and the 1870 US Census as Irena Thomas.