Tuilleadh feasa ar Éirinn óigh, medieval Gaelic-Irish topographical text, composed by Giolla na Naomh Ó hUidhrín (died 1420).
Tuilleadh feasa ... is both a supplement and a continuation of Seán Mór Ó Dubhagáin's Triallam timcheall na Fodla. Of the two, James Carney wrote: