Marcus had a contemporary namesake born in Chorzow on 04/02/1848 to Mendel Zernik and Fanny geb. Boehm.

A Marcus Zernik, a shoemaker from Rossberg, aged 24.75 years, married Eva Tichauer from Myslowitz, daughter of Salomon and Feigel, in Beuthen on 1873/10/17. His age at marriage places his birth around January 1849, suggesting he is neither of the above.