Thanks for the map info. There is a Lewelin on Haverford Road on a later map from 1753 at the same site: http://www.lowermerionhistory.org/atlas/scull.html see the middle left side on high res version. I also remember that there is a Llwellen Road near Ridley Creek Park because a friend grew up on that road. Not sure of the history of the road, but it's an area near some historic Quaker family homes. I think one of the homes of a Sharples or a related family is on the park property.