Thomas- he was born on Jan 13, 1893. his full name was John Blauvelt Allison. He was the youngest of I believe five children. My grandmother was the oldest, born July 13, 1885. John was known by me as uncle Jack. I remember him from the 1960s. Friendly, and I recall he always had a guitar and liked singing when visiting. The famous ancester was his father. There is a lot on the web, do a google search on "william o allison" he was born poor at the base of the palasades and became wealthy and left a trust for his children. This allowed them to follow their artistic interests. My grandmother was a poet, well published but not a lot of info on the web. Uncle Jack pursued music and painting. He was an archiver of the family history. Family rumor is that Burl Ives once approached him to partner. Another rumor was that he was asked to invest in a salad dressing by a guy whose name was Helman. Uncle Jack did neither. I have no facts to substantiate either- but quite possible. Uncle Jack lived in New York State. I remeber a white hose with a unused well in the backyard.