This image is a scan from the book "Les Tremblay" by Patrick Chevassu (published in 1981). This Coat of Arms was given to the Tremblay family in the 1500s (if my memory serves me well). It has something to do with the ironworks on the family land in Perche (a province of France now split between 3 French Departement). As far as I know, the canadian branch of the family is the only surviving offshoot of the branch holding these Arms.