Salvete omnes
I have been doing a survey of Roman inscriptions as part of a research project. I thought the Belgae here might be interested...
These are the names of various deities found on Roman inscriptions inside Belgica. The numbers indicate how frequently they are found, and thus give some idea of their relative importance to the Romans
Aesculapus 1, Ammaca (Gamaleda) 1, Ancamna (w/Mars) 9, Apollo (Borvonis 9, Grannus, Libentius, Vindonnus) 50, Aveta 3, Bellona 3, Britus 1, Caiva 1, Camloriga 1, Deus Caprionis 2, Cautopatis (Castor &Pollux) 2, Deus Cerunincus 2, Chrodoara 1, Cissonius 1, Concordia 1, Deus Cretonis 2, Damona 9, Diana (Nemetona) 15, Dirona Silvinis (w/Apollo) 3, Epona 4, Fons 1, Fortuna (Domestica, Redux) 7, Geni loci 19, Genius 3, Genius centuriae 1, Gesacus 1, Hecate 11, Hercules (Magisus, Saxanus) 35, Icovellauna 5, Isis Myrionyma 1, Dea Januaria 1, Jupiter O M: 57, Jupiter Dolichenus 2, Juno 7, Liber 1, Luna 1, Magna Mater 1, Maia 1, Mars (Bivis, Camulus, Cicolluis, Cnabetius, Intarbus, Iovantucarus, Litavus, Quadrivis, Smerulitanus, Trivis, Vegnius, Volmionis) 65, Matres 5, Mercurius (Attaedius, Bigentius, Iovanturcus, Moccus, Recmus, Visucius) 97, Minerva 13, Mithra 9, Mogontia 1, Nantosuelta (Sucellus) 1, Nemesis 3, Nennicus Adcenecus 1, Neptunus 1, Nymphae (Divinis aequis) 5, Obela 1, Oglaius 1, Deus Ouniorigis 1, Proserpina 2, Ritona Pritona 4, Rosemerta 17, Sabazius 1, Sequana 1, Serapis 1, Silvanus 2, Sinquatus 1, Sirona (Thirona) 6, Sol 2, Sol Invictus 5, Sucellus 5, Sulevis Junones 4, Veraudunus (et Inciona) 1, Vertumus (Pisintus) 2, Vesta 1, Victoria 5, Videtillus 1, Vihansa 1, Dea Virathetis 1, Virtus 1, Visucia 1, Deus Vorionis 3, Vulcanus 2, Deus incertus 27.