I have been studying Mary Elizabeth and have not been able to identify her maiden name. The John LORENTZ Will that lead people to believe she was a LORENTZ is an error. Elizabeth BONNETT mentioned in the Will is the wife of Samuel and Mary's son, Henry. John LORENTZ is also younger than Mary Elizabeth.
The size of counties has changed over time. It is possible that the BONNETT and family of Mary Elizabeth was from the area of Bedford Co., PA. I will post more information as I find it.
Would you happen to know the names of John MACK's sons. Two sons survived the Indian attack that killed his wife and daughter.