Looking for the Family of George Rigelhof and Katherine Rolsing of Kus

Looking for the family of George Rigelhof and Katherine Rolsing of Kustarevo(Neu Kolonie); Samara district; Seelman canton; Russia.
Their son, Alexander Rigelhof married Susan Opell in Russia and then came to Prince Albert, Saskatchewan, Canada approx. 1912. Their son Charles Alexander Rigelhof is my husband's grandfather.