Family of Dorothy Laskowski

I am researching the Sekulski/Kozlowski family from Poland. John Sekulski only appears in a 1918 Military Registration Card but I don't know where he was before that. He had three brothers, Teddy, Filex and Stanley. He married Veronica Koslowsk in Staten Island NY and they had nine children, Helen, Florence, Agnes, Teresa, Joseph, John, Edward and Thomas.

I am also researching the family of John Anthony Laskowski. He was a Policeman, Served in the army in WWII in the Asiatic-Pacific Theatre. He was also a blacksmith with O'Brien Brothers Shipyards. His mother's name was Stephanie, his father's name was John. He had five sisters, Jean, Marion, Jessie, Helen, Ann and one brother Thaddeus.

I am also searching for information regarding my father, John A. Laskowski, He was a policeman, he served in WWII, and he was a blacksmith at O'brien Brothhers shipyards in Rosebank. He had one brother, Thaddeus, and five sisters, Jean, Jessie, Marion, Ann and Helen. He married Teresa Sekulski and had three children, Anthony, Delores and Dorothy.

Any information would be appreciated. I am also willing to share the information that I have.