Two old friends and neighbours

I was on a nearly deserted beach in Southern Italy in mid-May four years ago having lunch at an otherwise customer empty beach bar. A couple, strangers to us, walking along the beach saw us and that the beach bar was open and came in for their lunch. We talked over lunch and walked back with them to the village of San Marco di Castellabate at one end of the beach. They were staying at the hotel we usually stay at in September but for this visit we were staying at a hotel in the village, by the harbour/marina. They joined us for a coffee on our hotel beach. During conversation I mentioned that our hotel was quiet at that time of year apart from a coach party from Germany and a retired Italian army officer reunion - both very jolly groups - although an English couple had arrived the previous evening. I further mentioned that this couple came from Surrey, near Coulsdon and the husband had a career with a particular organisation. The couple we had just met said that for ten years until thirty years ago they had next door neighbours in the West Country , the husband had worked for the same organisation and they had moved to Surrey. Now they exchange Christmas cards but had not met in person for thirty years. I mentioned this couple's first names but I did not know their family name. The couple we had met on the beach said their neighbours and friends had the same first names and their family name was (I cannot remember this now). I went to our hotel reception and checked. Yes, it was the same family name. The upshot of all this was that we told our two fellow guests of the coincidence at dinner that night and the two sets of neighbours and friends and us met for a drink in our hotel bar the next evening and we excused ourselves so they could relive past glories over dinner.