1. David Thomson & family

•  Net Worth: $20.3 B                                                                      
•  Source of Wealth: media                                                           
•  Citizen: Canada
•  Age: 56

Being the eldest son of Thomson family, David Thomson is the wealthiest man in the country of Canada. He is the chairman of Thomson Reuters, a media company which was started by his grandfather and is run by his family members. He is also the chairman of Woodbridge, The Globe and Mail Inc. (ref) He derives his wealth from stocks he owns in Thomson Reuters.  His family is the richest family in Canada. He holds an MA from university of Cambridge. Currently, he is the third Baron Thomson of Fleet. Baron Thomson of Fleet is a nobility title in British honor system and it was specially created for Roy Thomson who was grandfather of David. The title passed on from his father to him and thus making him third Baron. He continues to be the leading face of richest Canadian family.