#3. Irving Family
Residence: Saint John, N.B.
Major holdings: Irving Oil, J.D. Irving
The Irving family’s wealth began with a single sawmill in the 19th century. As they extended their tentacles into other industries—forestry, energy, media and shipbuilding—they ensured that each business supported the others; their gas fuelled their trucks that hauled their wood. But these days, the family is as famous for its feuds, which got a fresh injection of chatter with the release of a new book, Irving vs. Irving, in September.