The marriage is listed in the Schwaigern Parish Records, without a last name for Dorothea. The info I have on Haffner came from Lineages of Salt Lake City. One of the cousins had the Karrs traced and they came up with the Haffner family. They figure that Dorothea/Crito Carr is the sister of Lucretia Wilheit who also immigrated with her family in 1731 on the same boat. They figure that the sisters came under the protection of Lucretia's husband. There is a story that Hans Jacob Karr came the next year on the same boat after completing his military obligation. It is not proven, and there is noone named Karr on the next two years. There is a Hans Jacob, but cannot be sure that is him.
The last child that the Karrs had in Schwaigern was in 1726. They did not immigrate until 1731. That leaves 5 years to have the Heinrich and/or Christian that was listed on the boat manifest. They may have been born elsewhere in Germany while Hans was completing his military obligation. That doesn't explain how we have marriages for Gerig Heinrich's sisters, but nothing for the brothers. (But then, are these his sisters, or do they just match up well with our family?)
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There is a marriage for a Christian Carr in Montgomery Co. PA, but I have never successfully connected him to this line of Carr/Karrs.