Researching Orlowski, Cohen, Walugurah (Walagore), Korn, Perlemuter families from Nasielsk. 1. Open

I believe my  2nd great grandfather was Kalman (Walugurah) Cohen and his wife was Leah.  I beleive they had about 7 children.  Sarah (my great grandmother), Ben, Mary, Mollie, Rifka, David, Dubba.  I know that Sarah married Solomon Orlowski (Orloff in the US).  Solomon was born Aug 3, 1876 and Sarah Feb 10, 1876  both in Nasielsk.  They had 7 children, four of them born in Nasielsk.  Mollie (my grandmother), Esther, Agusta Ann, Daniel David, then the others born in the US were Morris, Dora and Albert.  I have the names Dawid Orlowski and Dwojra Perlemuter as possible parents of Solomon.