Tirerril Barony in Connacht, Ireland From Wikipedia, the free encyclopedia Tirerill (Tír Oirill) is a barony in east County Sligo.[1] It corresponds to the ancient túath of Tir Ollíol.[2] Quick facts Tír Oirill (Irish), Country ...Tirerril Tír Oirill (Irish)BaronyCountryIrelandProvinceConnachtCountySligoArea • Land306.8 km2 (118.5 sq mi)Close References [1]"Sligo History Project - Cairbre Drumcliabh". Allismotion.webs.com. Retrieved 26 April 2014. [2]"Sligo History Project - Tir Olliol". Allismotion.webs.com. Retrieved 26 April 2014. This article related to the geography of County Sligo, Ireland is a stub. You can help Wikipedia by adding missing information.vte Related Articles