These three brothers were from a family that lived in Kolno. As with the Majors, I do not know how many siblings remained in Europe.
Boleslaw Smolinski Jr. was born in Poland during his parents temporary return, but he grew up in Solvay, NY, and married Gertrude Maltby, which accounts for a Maltby family tree.
Also, there's a family tree for Peter Kaldowski, who married Wanda Smolinski, daughter of Boleslaw and Helen Smolinski.
Helen Smolinski married Stanley Major whose mother was a McLaughlin.