Hiranyakashipu and Hiranyaksha

Demons – the reborn gatekeepers of Vishnu, Jaya and Vijaya.

Hiranyakashipu was Vijaya, Hiranyaksha was Jaya.

Read the story of the demons here
http://hindumythologyforgennext.blogspot.com/2011/12/varaha-avatar.html
http://hindumythologyforgennext.blogspot.com/2012/01/narasimha-avatar.html