The furthest north-westerly point of Neanderthal range is known to be Wales!
Part of a Neanderthal jaw-bone and 2 teeth of an 11-year-old boy were found in Bontnewydd Palaeolithic Site, with teeth from at least 4 other Neanderthals.
The presence of a wolf was discovered in the same cave at around the same time.
No way of knowing for sure, but wouldn't it be lovely to imagine a boy and his dog living in the cave together?