The Garhajis (Garxajis, غرحجس , Full Nasab: Al-Qādhī Ismā'īl ibn ash-Shaykh Isḥāq ibn Aḥmad bin Muḥammad bin al-Ḥusayn bin 'Ali bin Muhammad bin Ḥamza bin 'Abdullah bin Ayyub bin Qasim bin Ahmad bin Ali bin Isa bin Yahya bin Ja’far bin Ali al-Hadi bin Muhammad al-Jawad bin Ali al-Ridha bin Musa al-Kadhim bin Ja'far al-Sadiq bin Muhammad al-Baqir bin Ali Zayn Al-Abidin bin Husayn bin Ali bin Abi Talib al-Hashimi al-Qurashi ) historically known as the Habar Gerhajis (Habar Garxajis) is a major clan of the wider Isaaq clan family. They are the traditional holders of the Isaaq Sultanate and Habr Yunis Sultanate since the 18th century. As descendants of Ismail bin Sheikh Isaaq, its members form a part of the Habar Magaadle confederation, and they constitute the largest sub-clan of the Isaaq. The Garhajis are divided into two major sub-clans: the Habr Yunis (Sa'īd Ismail) and Eidagale (Da'ud Isma'īl). They are traditionally nomadic pastoralists, merchants and skilled poets.
The Garhajis inhabit the western Togdheer, southern Maroodi Jeex, southern Sahil, northern Sool and central Sanaag regions of Somaliland. They also inhabit the Degehbur, Wardheer and Aware zones in the Haud region of Ethiopia. They also have a large settlement in Kenya where they are known as a constituent segment of the Isahakia community. A subclan of the Habr Yunis, the Damal Muse, also inhabit the Mudug region of Somalia.
Historically, the Garhajis took part in the conquest of Abyssinia and were part of the Adal Sultanate and are mentioned in the book Futuh Al-Habash (Conquest of Abyssinia) as the Habar Magaadle. The Habar Magaadle consist of the Habar Yunis, Eidagale, Habar Awal, Arap and Ayub clans. The Habar Magaadle are known for producing a historical figure known as Ahmad Gurey bin Husain who was the right-hand man of Ahmad ibn Ibrahim al-Ghazi.
I. M. Lewis discusses the existence of another leader named Ahmad Gurey, and suggests that the two leaders have been conflated into one historical figure:The text refers to two Ahmad's with the nickname 'Left-handed'.