My maternal grandmother, Carrie Helen Urwin, was the daughter of Washington Winfield Urwin - a descendent of John Urwin, based on the information in your post. She married Edgar Hurd Brown and they lived in West Virginia for many years. After Carrie Urwin's death (she had some apparent mental disabilities and was in a mental hospital for some period of time the details of which are not known to me or my mother), Edgar H. Brown remarried and eventually lived of Falls Road near Reisterstown Rd. Maryland.
I have a 1920 publication issued by one of the Brown relatives which follows the ancestors of the Browns into the 18th century.
Although this line of the Urwin family (meaning the Brown side) is not directly related, I would be happy to forward a copy of that information to you if you so desire.
I could also provide you with information about the Carder descendents from Carrie Helen Urwin if you desire. I would appreciate learning more about the Urwins. My mother is in her mid-80s and does not have much additional information about the Browns, much less the Urwins. My mother was born in Uniontown, PA and she did not know that her mother had resided in Gallia County, OH at age 9, based on the info I found today in the 1900 census.