Niall Ó Siadhail Niall Ó Siadhail is a London-based writer and musician originally from County Tyrone. He is also an Irish language activist and teacher, and producer/editor of the podcast Nuacht Mhall. @niallosiadhail Tagged Niall Ó Siadhail, bio notes Post navigation Previous Previous post: Jack Ó DrisceoilNext Next post: Gearóidín Nic Cárthaigh