Most of the information I have comes off of censuses but I did find a listing for John Baptiste L'Ecuyer and Josephine Benoit's marriage on ancestry.com.
Francoise Amable L'Ecuyer and Marie Anne Falcon
Pierre L'Ecuyer and Rose Boudreau
Narcisse L'Ecuyer and Marguerite Le Clerc
30 Jul 1839 L'Acadie, Quebec - lived in Bourbonnais Kankakee County, then in Kankakee, Kankakee County
John Baptiste L'Ecuyer and Domothilde Raymond
not sure the date of their marriage but they lived in Kankakee.
John Baptiste L'Ecuyer (2) and Marie Josephine Benoit
May 18, 1888 in St. Joseph, Cloud County Kansas as far as I know. Then they moved to Kankakee for awhile then into Chicago.
Otto Arle Urban and Dorene L'Ecuyer
ca 1929 I believe in Chicago
William Urban and Waldene Gammill
Denver Colorado (about 1963)