"As a young man, my own uncle, Adleric, was part of the forces of Westmarch that fought against King Leoric's army, when the king went mad. Adleric even once met Deckard Cain in Tristram, and he has seen demons with his own eyes."— Lorath Nahr(src)
Alderic Nahr was a member of House Nahr.
During the Darkening of Tristram, Alderic was part of the forces of Westmarch that defeated the Royal Army of Khanduras, as sent by a mad King Leoric. Alderic later claimed to have met Deckard Cain in Tristram.