Would be interested to know about your trip to England. You may have seen some of my posts from years ago. From my work, the Yearwood name originates from a tiny village called Yarwood Heath, near Manchester and Rostherne, in Chester County. There are very old graves there from the 1400s and records from late 1300s to current. I too am related to John and Katherine through their son Robert, then Andrew, Perry, Abel T., John H. and Rufus R. Yearwood. Yarwood Heath is still on the map today.
From what I can tell our John Yearwood crossed to VA or PA on the ship Anne, sailing under Captain Thomas Wrangham with prisoners from Newgate Prison. John was in VA in 1754, Halifax County, NC in 1763 and Rowan County, NC by 1770s. He disappears before 1790, but his sons remain in same general area, except for Robert who left for GA before 1790.