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Nasir al-Dawla was born al-Hasan ibn Abdallah, the eldest son of Abu'l-Hayja Abdallah ibn Hamdan (died 929), son of Hamdan ibn Hamdun ibn al-Harith, who gave his name to the Hamdanid dynasty. The Hamdanids were a branch of the Banu Taghlib, an Arab tribe resident in the area of the Jazira (Upper Mesopotamia) since pre-Islamic times. The Taghlibs had traditionally controlled Mosul and its region until the late 9th century, when the Abbasid government tried to impose firmer control over the province. Hamdan ibn Hamdun was one of the most determined Taghlibi leaders in opposing this move. Notably, in his effort to fend off the Abbasids, he secured the alliance of the Kurds living in the mountains north of Mosul, a fact which would be of considerable importance in his family's later fortunes. Family members intermarried with Kurds, who were also prominent in the Hamdanid military.