Abraham Steinberg's Parents and Siblings

I was surprised to see that Abraham Steinberg's arrival document (I've posted it as a photo) shows he was coming to stay with his brother @Max Steinberg. Subsequent census info shows that Max had children who lived in the Baltimore area. I wonder if anyone knows anything of Max's family, or whether they had other siblings, particularly in Baltimore?

Also, I noticed Abraham's death certificate (I sent away for it and posted it here as a photo) listed his parents names as unknown. I hope to visit his grave soon to at least learn his father's Hebrew name. Does anyone know anything about Abraham's parents? Or where his grave is? (I know it's at the Rosedale cemetery in Baltimore at Philadelphia and Hamilton Avenue, but that cemetery is very large). Another thing I could do is send away for his brother Max's death certificate, which may have more information about their parents...