Comhar Dún Chaocháin Teo is a community development co-operative based in the peripheral, rural, Gaeltacht, North Mayo area of Ireland. It is registered with the Registry of Friendly Societies and its purpose is to promote the linguistic, cultural, infrastructural, educational and social development of the parish of Kilcommon in Erris, and to develop in an integrated and sustainable manner the material and human resources of the area. The Irish name Comhar Dún Chaocháin Teo means "Caochán's Fort Co-operative, Limited". Comhar means "co-operative"; Dún refers to an ancient promontory fort; Caochán was a one-eyed king (caoch meaning "blind") of legend who resided in the fort here during the time of the Ulster Cycle of tales; Teo is short for Teoranta, meaning "limited" in Irish.