Yakov Yitzach Chajes, Dayan and Moreh Zedek of Prague

The information on this profile is from the Unbroken Chain 3rd Edition
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129 haRav Jacob Isaac Chajes bn haRav Elieser zTs”l chacham v’sofer, dajan v’darschan katsin rosh v’manhig 1687 (Footnote: see Gal-Ed 155) [Jacob Isaac went by Isaac, not Jacob]
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Note: a few decades earlier there was Yitzoch Chayes ABD Prague:haGaon Yitzhak Chayot, ABD Prague

This raises the possibility that the earlier Yitzoch Chayes is part of the same family, perhaps they are uncle/nephew, which would mean that Avraham Chayes (the father of the earlier Yitzoch) is the grandfather of Yakov Yitzach.