I descend from William Whittington 1719-1799 Born England, came to America 1768. There were very Whittington's at that time in Boston, but early Whittington's were in Maryland. Have you searched the Whittington-Brown book by Winona Whittington Pfander? She covers a lot of Whittington lines in that.
William Whittington had one son with Elizabeth Bailey MacNeil Palfrie; William Whittington Jr. He and Hepzibah Lincoln had a very large family. I descend from one of the younger sons; Granville who followed an older brother to Arkansas. Perhaps you are from the Maryland or Virginia Whittington's.