Blannovii was a small tribe clientes of the powerful Aedui which joined them in the coalition against Romans, in 52 BC. Their territory, in the region of the Aedui, is not precisely localized.

Carte des Blannovii

We only know them by a quote by Julius Caesar, in The Gallic Wars, where they appear alongside the Segusiaves, Ambivaretes and Aulerci Brannovices, as clientes of their neighbours: the Aedui .