From what I remember JP Pruitt was only a name on a mailbox but I think it appeared more than once. A lot of these names I've listed are people whose faces never appeared on screen. Some of them were just places that were talked about or driven by. I have a lot of them matched up with roads, landmarks, ponds, etc. When I retire I'd like to make a map as big as a wall. I've made smaller ones in the past.
The writers must've liked the name Pruitt. There was Mr. Pruitt the printer in 'Mrs. Daisy Hogg', and one of the characters in 'The Treasure of Soggy Marsh' was also called Pruitt. Besides those, there were mentions of Pruitt Corners, Mr. Pruitt's farm, Pruitt's Hollow, Pruitt's pasture and Pruitt's Meadow (some of which have already been mentioned by Roger).