according to this file in Geni it has the son Jacob's wife married to the father. Which I know is stated in the Lancaster Mennonite vital records but I would tend to believe a deed which is witnessed and documented. There is also the issue with Frey/Krey which I guess can easily be misread as in the 1700's the deeds were hand written not typed and the translation could have easily mistaken the F for a K as they tended to write in curly q fashion back then.