By the way, Google really is an incredible tool.
I googled prichard family wales welsh national library and got these:http://wbo.llgc.org.uk/en/s-PRIC-WIL-1749.htmlhttp://wbo.llgc.org.uk/en/s-PRIC-WIL-1702.html
This family was in Caernarvonshire, which, according to Ken, is where Penmachno originally was. And, do you notice the alternate/original spelling of the name(s)? Prisiart, Williams....