Gender: girl
When searching for D. Cwajgenberg there was only one match that was born between the years 1921 and 1927. The girl was DOBRA CWAJGENBERG and she was born 15 Nov 1926 and she lived at Hohens 30A flat 11 and she had KINDER KOL MARYSIN as an address. There was also Dobrah Cwajgenberg with the same birthdate and lived at SPERLING 8 flat 5 and BUSCHLINER 75. However, it says he's male insteade of female. I believe this is an error given the fact Dobrah is most likely a Female name.
Upon doing more research on Dobra I found different variations of her name, DOBRA CWEIGENBERG (with addresses HOHENS 30A flat 4 and had a note: KINDER KOLO MARYSIN 30) and DOBRA ZWAJZENBERG with address SPERLING 8 flat 5. Given the similar birthdates/addresses I believe Dobrah and Dobra are infact the same person.
According to the secondary sources If Dobra/Dobrah was deported in March of 1942 she would have been sent to Chelmno where she was killed in the gas vans.
I found her father as Dawid Cwajgenberg/ZWAJZENBERG born 15 May 1897, her mother as FEIGA CWAJGENBERG or FAJGA ZWAJZENBERG born 1 May 1892 and her sister as GITA LISZKA ZWAJZENBERG or JIDA LISZKA CWAJGENBERG born 2 July 1922. The whole family was sent to Chelmno and killed in the gas vans.