R' Mordechai Mardush's description reads:
"R' Mordecai Auerbach, A.B.D. Bomberg and Kremenets, son of Reb David Marx Wohl, zum weissen Schwan ABD Rawa whose sister was the mother of Rabbi David Oppenheim, son of Reb Avigdor, husband of the sister of the Ta”z, daughter of Reb Shmuel of Ludmir"
So first off:
1) What is the correct way to read this??
a) "R' MM, son of R' Dovid, whose sister was the mother of R' David Oppenheim (son of R' Avigdor), husband of the sister of the Ta”z" [She was married to R' David Oppenheim, who was R' MM's cousin], or
b) "R' MM, son of R' Dovid, (whose sister was the mother of R' David Oppenheim), son of R' Avigdor, husband of the sister of the Ta”z" [She was married to R' Avigdor, who was R' Dovid's father], or
c) "R' MM, son of R' Dovid (whose sister was the mother of R' David Oppenheim son of R' Avigdor), husband of the sister of the Ta”z" [She was married to R' Dovid and was the mother of R' MM], or
d) something else entirely?
2) Is this how it was written at the source? Because that's pretty confusing language. Does someone have the original source for that to post on the profile?
3) The only "sister of the Ta"z" I could find was sister of taz anonymos Aurbach, and her father being r` shmuel halevi, of ludmir, but these were added only a couple of years ago, and are not connected to Rabbi David HaLevi Segal, "Turei Zahavf" (TuZ/TaZ) (the Ta"z). She's also here as the mother of R' Dovid Auerbach, not as his wife. Does anyone have any other source about the Ta"z's sister being the mother/grandmother of Mordechai Marduch Auerbach? Or about the Ta"z having a sister in the first place?
This all came about because what I have in my notes from my grandfather was that Mordechai M. Auerbach's mother (rather than his grandmother) was a sister of the Ta"z, but I don't have any sources.