I have Phebe Howard as daughter of Mathew Howard and Phebe Burges. She married Henry Jenne/Jennings and son Henry Jenna/Jennings in 1777. As far as the name change from Jenne to Jennings, I was in Leyden in the Netherlands in 2013 and was in the church that they worshiped in. I also went to the pilgrim museum which is run by the foremost authority on the pilgrims and he showed me John and Sarah's marriage papers and it had John Jenne/ Jennings right on the papers. So the name Jennings was always there but I don't know why.