Derek Proudmoore was the first son of Grand Admiral Daelin Proudmoore, and elder sibling of Tandred and Jaina. Being the eldest son, Derek was first in line to inherit the Merchant-Kingdom of Kul Tiras.

During the Second War, Derek was in command of a destroyer in the Third Fleet, accompanying his father in battle against the orcish navy. Without warning, they came under attack by dragon riders in the service of the Horde. Though he attempted to warn his father of the danger, Derek was incinerated by one of the dragons as he stood on top of the crow's nest. His boat was sent to the bottom shortly thereafter. ^{ToD 314DotD #?}