Two Giuseppes and a Giovanni

I am slowly working out who is who on the allotment. Joe #1's real name is Giuseppe Greco, and Joe #2's real name is Giuseppe Olivieri. John's (82) name is Giovanni. I think.

Frank (369/370) told me this when he passed the Salvation Army allotment on his way home. His real name is apparently Francesco Mackenzie. He says he's got Scottish ancestry. He had me believing him, but I think his name is really Vincenzi, not Mackenzie.