Knight Berenike was a knight who was known for his size and strength. His knights were giant men capable of wielding huge weapons that required immense strength to wield. Many of these knights, after becoming Undead, flocked to Lordran in a bid to find a cure, but became hollow and pose a threat to all those on the road to Anor Londo.
The famous knight Black Iron Tarkus was a Berenike Knight. Tarkus died in Anor Londo after his victory in Sen's Fortress.