What you should be looking at is Kirk Merrington, not far from Sedgefield in and around the early 1700s.
There are 100s of records for Spanish born people in the area and it's got nothing to do with the Armada.
These people were Calè, spanish-gypsies. I am a descendent of this wave of migration, recently confirmed through genealogy teamwork - thanks to my DNA relative in Spain.
Turns out thousands of spanish-gypsy refugees arrived on British Shores at this time, escaping the inquisition. I don't know, but I think that the lords of the mannor around Spenneymoor, the Salvin's were an uber catholic family and likely granted their Spanish counterparts refuge.
There was another cluster of these families around Wilton, Somerset. They eventually married in with already existing Romanichal families in the UK, in particular County Durham.