What are the four words beginning with J that come to mind?
In relation to what? Or did you mean the first four words? And why?
Maybe you should have specified English place names, as I can only think of three (Jarrow, Jesmond, Jacksdale).
In fact the letter J does not appear in the club names in any of the top 13 divisions of English football (depending on what Beaconsfield SYCOB stands for!) and only once in all eight divisions of Scottish senior football.