1)
Who are "Bnei Naval Gam Bnei Vli Shem"?
1.
Metzudas David, Metzudas Tziyon: The children of lowly, disgraced people of no renown - they disgraced me.
2.
Malbim: Because they were so lowly, they were not allowed to join with people.
2)
What is "Nik'u"?


