Ravana and Kumbhakarna

The reborn gatekeepers of Vishnu, Jaya and Vijaya.

Kumbhakarna is Vijaya, his brother Ravana is Jaya.

In the Ramcharitmanas they are the reborn King Pratapbhanu and his brother Arimardan.

Read about Kumbhakarna and Ravana here
http://utkarshspeak.blogspot.com/2011/01/ravans-family-kumbhakarna.html
http://sushmajee.com/biographies/raavan/raavan-1.htm