A note about the other spellings you see. My family has Coon, Coone, McCoone, Maccoone and possibly originally MacHolme that somehow got corrupted in this particular family's line. As you can guess from the Macs, this is family of Scottish ancestry. I don't actually show them in Jefferson County, Pa., but their direct descendants include the Perrins, who come to PA from NY in the early 1800s. It would not have been surprising if other related families made the same migration at about the same time, so there well have been Coon cousins who settled in Jefferson County. Unlike most of the Scot-descended folk of western PA, the Coons were never in Northern Ireland, but came directly from Scotland. They apparently settled in Rhode Island in the 1600s, then migrated to Washington Co., N.Y., (Granville area) during the 1780s.