Flaithniadh mac Congal (died 776) was Abbot of Clonfert, Ireland.

References

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
Revised edition of McCarthy's synchronisms at Trinity College Dublin.
Byrne, Francis John (2001), Irish Kings and High-Kings, Dublin: Four Courts Press, ISBN 978-1-85182-196-9
Lysaght, Eamonn (1978), The Surnames of Ireland. ISBN 0-7165-2278-0, pp. 233–34.

Preceded byCethernach ua Ermono Abbot of Clonfert 768–776 Succeeded byMac Flaithniadh