I believe R' Yehudah may also be the father of Sura Riwka Kalonymos De Vitry who then becomes the progenitor of the R' Shmuel Jaffe of Dampierre line. I am not attaching the Sura Riwka profile here to avoid merge complications.
Possible, but I have no knowledge or documentation to confirm or reject. definitely plausible, since kalonymous was a very reputable family in Mainz, and it makes sense they would have married. sorry I have nothing more to add on this one.
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