Ludwik Jan Maciejewski was born to Jan and Weronika Lewandowska Maciejewski in Buffalo, Erie, New York, 26 August 1894, and was baptized at St. Stanislaus Church. The youngest child, he was only a year old when his father died on 30 April 1896.
In 1910, Veronica Maciejewski and her children lived at 127 Goodyear Avenue in Buffalo. In the 1910 census, their neighbors were Lucasz and Anastazya Jankowski and family.
Louis was especially close to two of the Jankowski children.
In 1911, Louis Maciejewski and Bronisław (Bruno) Jankowski got into some trouble for fighting and were sent to the reformatory in Elmira, New York, according to accounts in the Buffalo Courier newspapers on October 21 and 23.
Louis Maciejewski and Martha Jankowska were married on February 14, 1916.
In 1918, Louis registered for the WWI draft as L. Jan Maciejewski, signing his name Louis J. Maciejewski. He lived at 127 Goodyear with his wife and child.
Like his older brother Gust, Louis and his family used the name Warner. The Buffalo Courier Express on November 10, 1936, had a feature about “Attractive Autumn Brides”: “Mrs. William E. Pfister, Jr., was, before her marriage to Mr. Pfister, Miss Genevieve Warner, daughter of Mr. & Mrs. Louis Warner of Detroit, Mich.”
Louis died 2 February 1938 at the age of 43. On February 7, 1938, the Buffalo Courier Express ran a short obituary for “MACIEJEWSKI—Louis J., husband of Martha. Interment, February 5th, in Holy Sepulchre Cemetery.” The brevity of the notice and that it was published after any wake or funeral services tend to indicate a death under unusual circumstances.