Klaus Nourom was born Joseph Gadren, on a small farm, south-east of where modern day Varrock stands, during the late period of the Second Age. He grew up the son of a small farmer, and had a loving mother. His family was not well off, but they did not struggle within Zaros' Empire. Klaus had three sisters, all younger, and all in training to be brides. From here-on-out I shall Klaus shall be referred to as Joseph, until the day he becomes Klaus.
Joseph had great ambition - His idol was the only Human General of Zaros' army, though such an idol was not uncommon. He would train with a wooden sword every day, before dawn and the work began, and at dusk, as the farm slowed for the evening. He was an average lad, not taller than many and not broader than most of the farming community.