Hmm... the Viking settlement of the Northwest was in the tenth century, St Patrick died in the first half of the fifth century so I imagine a cult would be well established.
The Vikings settling in the NW would have probably been christianised, probably with Celtic Christianity which but a lot of store in Saints and holy men, so there could be a connection.
On another note: here is a strange cross.
Attachment 21311
This is built into the wall at the end of St Michael's Road in the Hamlet. I'd like to know more about it.