sentences:  The trophy is named in memory of Joan Moreen McKowen and was established in 1994.Formerly referred to as The AJIHL Champions Trophy due to not having a name, the award was renamed the Nathan Walker Trophy for the 2018-19 Australian Junior Ice Hockey League season, in honor of Australia's first player to make it to the National Hockey League - Nathan Walker.The Nathan Walker Trophy is awarded to the winners of the playoffs for the national junior men's ice hockey competition, the Australian Junior Ice Hockey League.