Sir Cahir Rua O'Doherty (kana; 1587<unk>5 Chikunguru 1608) aive wekupedzisira Gaelic Chief weZita reClan O'Doherty uye Ishe weInishowen, mune izvo zvino County Donegal. O'Doherty akanga ari mutsigiri anozivikanwa munguva yeKupandukira kwaTyrone uye akazozivikanwa saO'Doherty waMambokadzi nokuda kwebasa rake parutivi rweCrown munguva yekurwisana. Mushure mehondo O'Doherty aive nezvinangwa zvekuve mutongi uye akanyorera chinzvimbo mumba maHenry Frederick, Muchinda weWales, asi akawedzera kupokana nevakuru vakuru vekuIreland vakaita saVice King Sir Arthur Chichester uye Gavhuna weDerry Sir George Paulet. Muna 1608 akatanga Kumukira kwaO'Doherty, achitora Derry kubva kuna Paulet uye achipisa kusvika pasi
. O'Doherty akazourayiwa muhondo paKilmacrennan, uye kupandukira kwakakurumidza kuparara.