My grandfather William Victor Ladner and your father were third cousins.
Athanase(Tunas) Ladner son of Laurentine Julius Ladner and Olivia Elody Hode. Laurentine (Laurence, Lauren) Ladner was the son of Gatien Ladner and Leonise Martin. Olivia Elody Hode was the daughter of Mathurin Hode and Olivia Elizabeth Malley. Gatien Ladner was the son of Julien and Clementine Ladner. Leonise Martin as the daughter of Jean Martin and Rosalie Ladner.
Clementine Ladner and my grandfather's namesake, her brother Guillaume Victor Ladner were brother and sister. I do have some more information on your family if you are interested.