Jonas Siegenthaler is a Swiss professional ice hockey defenceman for the New Jersey Devils of the National Hockey League (NHL).

The 2015 World Junior Ice Hockey Championships was the 39th edition of Ice Hockey World Junior Championship, played from December 26, 2014 to January 5, 2015. It was co-hosted by Toronto, Ontario, and Montreal, Quebec, Canada, and organized by Hockey Canada, Hockey Quebec, the Ontario Hockey Federation, the Montreal Canadiens, Maple Leafs Sports and Entertainment and Evenko. Games were split between Air Canada Centre in Toronto and Bell Centre in Montreal, with Montreal hosting Group A matches and two quarter finals, and Toronto hosting Group B, along with the relegation games, two quarter finals, along with the semi-finals, bronze medal, and gold medal games.