Attacotti (Atticoti, Attacoti, Atecotti, Atticotti, Ategutti, etc.

variously spelled) refers to a people who despoil Roman Britain between 364 and 368, along with Scotti, Picts, Saxons, Roman military deserters, and the indigenous Britons themselves.

The marauders are defeated by Count Theodosius in 368.

Units of Attacotti are recorded about 400 in the Notitia Dignitatum, and one tombstone of a soldier of the Atecutti is known.

Their existence as a distinct people is given additional credence by two incidental references to them, as cannibals and as having wives in common, in the writings of Saint Jerome.There is no other information available on the Attacotti other than their brief mention in these sources, and based on historical evidence, there is nothing more to be said of them.

They likely served as Roman auxiliaries, and have a possible link to Ireland.