http://www.academia.edu/4364068/%D7%91%D7%99%D7%A8%D7%95%D7%A8_%D7%...
From the above article it is clear that
a. Reb Moshe is NOT connected through his wife nor mother to R. Naftali Katz the Semichat Chachamim.
b. Also that he did not use the name Rokeach, but rather Margolios, until the next generation.
c. Also that he is NOT connected with Reb Shmuel Shmelke the tailors shul rabbi in Brody.