This looks suspiciously like the same Oliver!!I see that David and Lucretia both died in Erie County.There are several other references to Erie County,as well as common names, such as Charles, Curtis Abel, Edwin Hall, and Cynthia Anise/Aninis. My Oliver Brewer m. Lucinda Forbes in Buffalo, NY on 6/1/1851 and they were divorced 9/17/1864.There were 2 sons born of that marriage, my ggrandfather, Charles Oliver, and I believe the other son may have been Hall Reed Brewer b. 1/4/1850, d. in Wisconsin. ( Reportedly from family stories, after the divorce, Lucinda married a man by the name of Pantera and moved to Wisconsin.) According to the dates, Hall Reed would have been illegitimate if he belonged to Oliver and Lucinda and that could possibly be why my ggrandfather never talked about his family!! Oliver remarried a woman by the name of Sarah Smith and had several children:Wallace; Nelley (m. Wm. Rudd); Lewis; Earnest; Freddy; Forest; Clara; Robert; Minnie; and Annice (m. Hugh Gleason).I am thinking that there was also a Curtis and Abel or a Curtis Abel, but I don't have that info in front of me right now. The birthdate for your Oliver John would have made him the age of 20 or 21 when my ggrandfather was born (1855/56) which is certainly a viable age to be his father.An interesting point is that, according to the marriage records for Lucinda and Oliver, if it was your Oliver, they would have married when Oliver was 15 (of course, people did marry young on occasion back then....my maternal grandmother was married at 14 or 15 and my son's 1st wife had a child when she was 14 also, so it's not completely out of the question that this could link up). Another similarity is that there are other Stewarts in my family line as well and, as I have found in the Campbell/Christy lines of my family, cousins and in-laws often intermarried. Of course, Oliver stayed in New York and died in Erie County and is buried in Collins Center with his 2nd wife, Sarah, and several of his bachelor sons are buried there, too.(Wallace was killed by a train and I have a copy of the newspaper article about it). My ggrandfather, Charles Oliver, was the one who migrated to Iowa and settled here on the homeplace, which is now owned by my father and his sister and has been a Century Farm since the mid-1980s. I believe the key to linking these families would be to find Oliver and Lucinda in a NY census.The only census year they were together would be 1860 since they were married in 1851 and divorced in 1864, however, I don't know if the census records go back that far nor do I know what county they would have been living in at that time.It could possibly be Erie County or Oneida County.The census entry could contain a birthdate and birthplace for Oliver and, if they match up with the information you have, it could be the link we are missing.