The nine mbari (clans) of the Kikuyu are the social backbone of the entire community, each descended from one of Mumbi's nine daughters in the Gikuyu and Mumbi origin myth. Clan membership was matrilineal in name but operated within a patriarchal inheritance structure: you belonged to your mother's clan, but land passed through your father's Githaka estate. The clans were not geographically separated, they lived side by side across the central highlands.
Key Facts
- The nine clans are: Acheera (Aacera), Agachiku, Airimu, Ambui, Angari, Anjiru, Angui (also called Aithiegeni), Aithaga (also called Ambura or Eethaga), and Aitherandu (also called Angechi)
- Each clan traces its lineage to a specific daughter of Gikuyu and Mumbi's wife Mumbi
- No clan was restricted to a single region, Muranga, Kiambu, and Nyeri all had representatives of all nine clans living among one another
- Real political power lay with the council of elders (kiama) within each clan, not with a central chief
- Each clan forwarded its council leader to the broader community council, a sophisticated federal structure
- Clans served practical social functions: marriage was typically exogamous (you married outside your clan), preventing inbreeding across generations
- The Age Sets (riika) system cut across clan lines, creating horizontal bonds between age-mates that balanced the vertical bonds of clan loyalty
- When the British imposed individual land titles in the colonial period, the collective clan dimension of Githaka tenure was destroyed
The Names and Their Roots
Each clan name preserves the name of Mumbi's daughter:
- Acheera, from Waceera
- Ambui, from Wambui
- Agachiku, from Wagachiku
- Airimu, from Wairumu
- Angari, from Wangari
- Anjiru, from Wanjiru
- Angui, from Wangui
- Aithaga, from Waithaga
- Aitherandu, from Waitherandu (associated with Nyambura in some accounts)
See Also
Related
Gikuyu and Mumbi | Githaka | Age Sets | Muranga | Kiambu | Index