Fiannamail mac Máele Tuile (died 680) was a King of Leinster from the Uí Máil branch of the Laigin. He was the great-grandson of Áed Dibchine mac Senaig (died 595), a previous king and grandson of Rónán Crach, possibly the Leinster king mentioned in the saga "Fingal Rónáin" (The Kinslaying of Rónán).
In 677 the Laigin fought with the high king Fínsnechta Fledach (died 695) of the Síl nÁedo Sláine at the Battle of Loch Gabor (Lagore, County Meath). There was mutual slaughter on both sides but Finsnechta emerged the victor. In 680 Fiannamail was slain by one of his own people named Foichsechán at the instigation of the high king Finsnechta.
Fiannamail was ancestor to the Uí Théig (O'Tighe) north of Uí Máil territory just west of the Wicklow Mountains.
- Francis J.Byrne, Irish Kings and High-Kings, Table 8
- Annals of Ulster AU 677.3
- Annals of Tigernach AT 680.3
- Annals of Ulster at CELT: Corpus of Electronic Texts at University College Cork
- Annals of Tigernach at CELT: Corpus of Electronic Texts at University College Cork
- Byrne, Francis John (2001), Irish Kings and High-Kings, Dublin: Four Courts Press, ISBN 978-1-85182-196-9
- Book of Leinster,Rig Laigin at CELT: Corpus of Electronic Texts at University College Cork