Based on the Lodz Ghetto Inhabitants list, this is the best fit for N. Jablonska.
Using Jablonska, I was able to piece together these family members using the same address.
Using your hint to try Jablonski as well, I was able to find everyone minus Nechuma. The interesting thing, is it references the second address in Jablonska records as a result of a move. I've editted the addresses accordingly. There is also a boy, Nachman, as you mentioned, but he only appears in Jablonski, not Jablonska. Also, there is only his birth year, 1929, which is Nechuma's birth year. As he has the same address as the parents and sister of Jablonski, we can deduce he is the brother. Also, I'm going to guess, as unless Nechuma was born like two or three months early, that Nechuma and Nachman are twins, and will enter him into the siblings.