Niav Gallagher is a medieval historian, specialising in the links between religion and politics in thirteenth- to fifteenth-century Ireland, Scotland and Wales. Among other roles, she has worked as a lecturer and as a researcher for genealogical and historical research company Eneclann, on several collaborative projects, including the National Archives Millennium Project and the Irish Battlefields Project. Niav is a graduate of University College Dublin (M.Litt.) and Trinity College Dublin (Ph.D.). She joined the Dictionary of Irish Biography as a researcher in 2018.