My Grandmother Justina Rose Kalwa was the daughter of John Kalwa and Mary Kozezmski. John was born 1859 in Danzig, Poland; Mary was born 25 Mar 1861 In Prussia/Poland, died 22 Nov 1927. Siblings of Justina Rose were: Mary Barbara; Anna; Frank; Frances; and Celia.
John was a Prussian Military Officer prior to his entry into U.S.
Hope that there is some connection that can be made.