Re: So are the Welsh
The Celtic tribe (the Milesians) that had settled in Galicia Spain spread to what is now Ireland, Isle of Man, Wales and Scotland and even to what is now England. The languages were and are very similar. Welsh is the hardest. lol
Although, no one has exactly pinpointed the origins of the Celts (they mingled and took on many that shared the same beliefs in their travels), I've seen different web sources that claim that the original Celtic tribe was also Germanic, specifically, Bavarian(must have been a very cold place in those days).