Gender: boy
School:
School #3
We believe Z. Mitelman could be Ezriel Zelig Mittelman based on the fact that his birthdate falls in the range of the birthdates of the boys who attended School #3 where Z. Mitelman attended school. Also Ezriel Zelig Mittelman's occupation was "schueler" which means he attended school in the camp, as did Z. Mitelman.
Abram, Estera, Chawa, and Basia all have the exact same addresses in Lodz as Ezriel does and based on each birthdate, we believe Abram and Estera are his parents and Basia and Chawa are his sisters.