Harold I. of Norway, surnamed Haarfager (fair-haired), by him the petty kingdoms of Norway were all conquered and knit into one compact realm; the story goes that he undertook this work to win the hand of his lady-love, and that he swore an oath neither to cut nor comb his hair till his task was done; (d. 930).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Harold II. * Haroun-al-Raschid