Gender: boy
I couldn't find any results under F. Ramer so I searched under fuzzy settings and found Franz Kramer born 29 Oct 1922 and he lived at Brunnen 18 flat 16 and he was deported 1.4.42. Given the fact Franz was born between the years 1921 and 1927 and his last name is similar I believe he's a good match for the student who signed the album.
I went onto Yad Vashem and under the List of Lodz ghetto inmates I found Franz Kremer with the same information. There was also Frantisek Kremer under the Deportation list with the similar birthdate 22/10/1921 and the Details of the transport: Transport C from Praha,Praha Hlavni Mesto,Bohemia,Czechoslovakia to Lodz,Ghetto,Poland on 26/10/1941.