Alp Arslan was the second Sultan of the Seljuk Empire and great-grandson of Seljuk, the eponymous founder of the dynasty. He greatly expanded the Seljuk territory and consolidated his power, defeating rivals to the south and northwest, and his victory over the Byzantines at the Battle of Manzikert, in 1071, ushered in the Turkoman settlement of Anatolia. For his military prowess and fighting skills, he obtained the name Alp Arslan, which means "Heroic Lion" in Turkish. Early life Alp Arslan was the son of Chaghri and nephew of Tughril, the founding Sultans of the Seljuk Empire. His grandfather was Mikail, who in turn was the son of the warlord Seljuk. He was the father of numerous children, including Malik-Shah I and Tutush I. It is unclear who the mother or mothers of his children were. He was known to have been married at least twice. His wives included the widow of his uncle Tughril, a Kara-Khanid princess known as Aka Khatun, and the daughter or niece of Bagrat IV of Georgia (who would later marry his vizier, Nizam al-Mulk). One of Seljuk's other sons was the Turkic chieftain Arslan Isra'il, whose son, Kutalmish, contested his nephew's succession to the sultanate. Alp Arslan's younger brothers Suleiman ibn Chaghri and Qavurt were his rivals. Kilij Arslan, the son and successor of Suleiman ibn Kutalmish (Kutalmish's son, who would later become Sultan of Rûm), was a major opponent of the Franks during the First Crusade and the Crusade of 1101. Early career Alp Arslan accompanied his uncle Tughril on campaigns in the south against the Fatimids while his father Chaghri remained in Khorasan. Upon Alp Arslan's return to Khorasan, he began his work in administration at his father's suggestion. While there, his father introduced him to Nizam al-Mulk, one of the most eminent statesmen in early Muslim history and Alp Arslan's future vizier. After the death of his father, Alp Arslan succeeded him as governor of Khorasan in 1059. His uncle Tughril died in 1063 and had designated his successor as Suleiman, Arslan's infant brother. Arslan and his uncle Kutalmish both contested this succession which was resolved at the battle of Damghan in 1063. Arslan defeated Kutalmish for the throne and succeeded on 27 April 1064 as sultan of the Seljuk Empire, thus becoming sole monarch of Persia from the river Oxus to the Tigris. In 1064 he led a campaign in Georgia