 In 1889, he was married to Louise Bouvier Drexel (1863 –1945), daughter of Francis Anthony Drexel and niece of Anthony J. Drexel, the most influential financier in the U.S. in the nineteenth century.Louise's mother, Emma Bouvier, is related to the family of Jacqueline Lee Bouvier Kennedy Onassis.Louise's half-sister was canonized as Saint Katharine Drexel on October 1, 2000 by Pope John Paul II.