Gender: boy
Although I could not find any matches for Russek Maniek and all of the results for last name 'Maniek' matched gender or age, Russek Mendel seems to fit the gender, age, and occupation criterea. I'm not sure if it is a match or if Mendel is a sufficient alternate for Maniek.
*I had originally searched with Russek as the last name but wrote it in wrong! Do you think Mendel Russek is right?
I searched all of the stages with each name and did not find any matches until the surviving brother as I had already mentioned.