Private User,
Adam, for starters, it appears that the problem began with this merge, and that the merge will need to be un-done:
https://www.geni.com/merge/view?revision_id=81539898960
I think that the two men are different. Although they may have appeared to be married to the same woman named Olga, it seems that there are 2 different women with similar names who often get confused with each other. The MP for the one who died 4/30/1594 was this one:
Abigail Ogla Katzenellenbogen who as you can see was actually married to Rabbi Shmuel Yehuda Katzenellenbogen, MaHaShiks, MaHaRaM son #1 and NOT to Shmuel Abraham Wahl, of Kremnitz
That said, none of the children you asked about (i.e. Isaac Constantine Wahl Katzenellenbogen and his siblings) were children of Rabbi Shmuel Yehuda Katzenellenbogen, MaHaShiks, MaHaRaM son #1
With regard to Isaac Constantine Wahl Katzenellenbogen, in particular, I have just now searched the index of all 6 volumes of "The Unbroken Chain", and I could not find anyone at all who has Constantine as any part of their name. So, I do not know who the correct parents would be for Isaac Constantine Wahl Katzenellenbogen and his siblings, or how they would have gotten the name Katzenellenbogen.
It seems to me that the person who added the profiles for Isaac Constantine Wahl Katzenellenbogen and his siblings, Private User may be able to shed further light on this matter, as he has included birth and death dates, and perhaps could provide us with additional information regarding his sources.
Kevin Lawrence Hanit and Randy Schoenberg, I want to bring this to your attention.
Claudia