Tribes who belonged to or among the Belgae included the

BelgaeGallia Comata, Celtae and Belgae
AquitaniGallia Comata, Celtae and Belgae
Galli and Aedui Gallia Comata, Celtae and Belgae
Remi
Bellovaciretreated into the fortress of Bratuspantium (between modern Amiens and Beauvais)
Suessionesthe town of Noviodunum (Soissons)
Nervii
Atrebates
Ambianiretreated into the fortress of Bratuspantium (between modern Amiens and Beauvais)
Morinialong with the Nervii, Menapii and Eburones
Menapiialong with the Nervii, Eburones and Morinii
CaletiArmorica and the Curiosolites, Redones, Ambibarii, Caletes, Osismi, Veneti, Lemovices and Venelli
Veliocasses and Viromandui.
Atuatuciwere descended from the Germanic Cimbri and Teutones.
CondrusiGerman tribes
EburonesGerman tribes; along with the Nervii, Menapii and Morinii
Caerosi German tribes
PaemaniGerman tribes
Ambiorix, a later leader of the EburonesCeltic name
Leuci
Treveri
Tungri and Mediomatrici
Posidonius includes the Armoricani