Many of us, if not most of us, have at least some non-English ancestors. It isn't remotely unique to Scouserpool, or even unusual.
Consider my maternal granddad. I never knew him, but according to reports he was about a gnat's dick away from being an Orangeman, at least in his attitudes. Yet I have found he was descended from two Irish Catholics who were married in a Catholic church in Dublin in the early 1800s. Which is pretty Irish by any standards.
I myself am undoubtedly English (albeit northern English) by culture, but I have an absolute shit ton of Welsh and Irish blood and, going further back some Scottish. (To say nothing of some very posh Europeans.) But again, this is nothing special. I suspect 99% of you out there would say the same if you checked out your ancestry.
The scousers just get off on pretending they are something special and unique. It's just another form of pernicious nationalism, like the Nazis claiming to be herrenvolk. Nothing more, nothing less, and it's fucking pathetic. Especially when their 'culture' comprises mostly nicking hub caps and throwing missiles at coaches.