The Brothers of Samuel Hoffman?

Samuel Hoffman was said to have been born "near Piatrokov, Poland" in 1832. He died 46 years later in Romansdorf, Kiev, Russia. In that death record, his birthplace is shown as Stanislawcz, Stadschonck, Poland. Below are the marriage records of Friederich and Johan Jacob Hoffman. Their birthplaces are included in the record. Are Friederich and Johan Jacob brothers? Are either or both brothers to Samuel?

Here is the right answer from Eva Childs.