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 bio notes, Niall Ó Siadhail Post navigation Previous Previous post: Gearóidín Nic CárthaighNext Next post: Jack Ó Drisceoil