I did quite a bit of research on Cayuga Treats for my sister's Treat family reunion this summer, and I have some information on Frances Treat's ancestry, but nothing on her marriage/descendants.Fred J. Treat was my half-sister's great granduncle. His brother Eugene Treat, my sister's great grandfather, is the main line that I was working on. Fred was born in Ann Arbor, Michigan in Nov 1862 to William W (possibly Wilson) Treat and Sarah J. Kick. His first wife Addie M. Kenyon, also born in Ann Arbor, gave birth to three children and died shortly after the last one, Lionel Treat in 17 Feb 1893.Her first two children predeceased her, and Lionel died in 1909.After Addie, Fred married Pearl D. Cottett in about 1903 (from 1910 Throop Census) and had four children (up to the 1920 Throop Census that is)
From the 1920 Census I have his children with Pearl as: Frances Treat b:about 1910 Dorothy I. Treat b:about 1912 Wilson Treat b:about 1915 Agnes Treat b:about 1917
Fred's sister Mary "Emily" Treat married James R. Blauvelt, and had four children:Arthur, George, Fred, and Gilbert.
Fred's brother Eugene G. Treat married Mary Josephine Weaver in about 1876, and died four years after the birth of his twin sons Stanton and Stanley Treat.
Hope this helps.I have more, and would like to know more, on this line.