Gender: girl
School:
School #19A
Searching for an M* Alabaster under fuzzy parameters, further narrowed down by the birthdate 1930 +/- 5 years turned up only one match: Masza Albaster, whose birthdate makes her the right age for her school and to have signed the album.
Sura Chana lived at the same address and was born in 1895, making her a possible mom, aunt, or older female relative. Rywka Laja was born 6 years before Masza, which could make her an older sister, cousin, or other female relative.
According to Secondary Source transport lists, the date on which Masza was transported (March 15, 1942) was part of a daily transportation to Chelmno. It is likely Masza was on this transport to Chelmno and died there.