I wandered into the Middlesex County probate records to see if I could find anything on the Hinchmans. As you probably know, Edmund & wife Elizabeth left none. But his son Thomas did, as did his wife. Elizabeth (wife of Thomas), names a Bridget, "who is the sister of my dear husband deceased." There is also a "kinswoman" Ruth Warren, wife of Joseph Warren named as executors and heirs to Elizabeth's will. This won't solve your issue, but I'll add the info to the appropriate profiles in case the connections become more clear later.