John Henderson, from Ireland, took up land in Jefferson Co., OH, in what became Ross Twp, in 1804. His wife was Sydney. His five children were Robert, John, Mary, Thomas and William (my line). John, Sr. died in 1813, leaving a will (Jefferson Co. will bk 1, p123); and an inventory (estates vol II, p127-130). Sydney lived at least until 1821, when she is mentioned in a deed. I don't know where in Ireland they came from, but the name is Scottish and they do not seem to be Catholic. so probably Ulster.William and his family left for Wayne Co., OH in the 1830's. He died there in 1845.