(35:18) "Vatikro shmo Ben Oni v'oviv koro lo Vinyomin-” - Why didn't Yaakov follow the wish of Rochel's name choice? These even seem to be her final words on this earth.
I heard in the name of Rav Aaron Drillich that we see from this the high esteem in which Yaakov and his wife Rochel held each other. Rochel named her son after his father Yaakov who declared in Breishis 49:3 "Kochi v'reishis ONI." She therefore called him Ben ONI, the son of Yaakov who accomplished the phenomenal feat of "reishis oni," my first strength, when siring Reuvain. This takes on even more significance in light of the fact that Reuvein was the child born of the mistaken union between Yakov and Leah when Rochel voluntarily gave over her dream of being with Yakov. Yaakov, on the other hand, named his son after his wife Rochel, Ben YOMIN, saying that he was the son of his right hand, namely Rochel.