Rowland Thornburgh of Maryland is not the Rowland Thornburgh who is the son of William Thornburgh, Esquire and Catherine Thornborough They did have a son named Rowland, but he lived his life in England. See here for details about that Rowland: https://www.wikitree.com/wiki/Thornburgh-105
I suggest that we remove the Rowland of Maryland from the parents currently attached to him. His parentage is currently unknown. https://www.wikitree.com/wiki/Thornburgh-317
Sincerely,
Tamas Caldwell-Gilbert