Reer Bicidyahan (Somali: Biciidyahan) is a sub-clan of the Majeerteen clan family, which is part of the larger Harti confederation of Darod clans.
Its members inhabit the eastern portions of the Ogaden, primarily in and around the Werder Zone. Reer Bicidyahan are also found in the north-central Mudug and southern Jubbada Hoose (Lower Jubba) regions of Somalia, particularly in the cities of Gaalkacyo and Kismayo. Suldaan Hasan Ali Baale is the current suldaan of reerbicidyahan. He succeeded his Father Suldan Ali baale in 1980
Reer Bicidyahan is a nickname for the people that are said to have descended from Ali bin Ibrahim ibn Jibril

Cali Ibrahim waxa uu dhalay
1. Siciid Cali Ibrahim
2. Sugul Cali Ibrahim
3. Obokor Cali Ibrahim
4. Xuseen Cali Ibrahim( Waran-fiiq).