Andraste, according to Dio Cassius, was a Celtic war goddess invoked by Boudica while fighting against the Roman occupation of Britain in AD 61:
I thank thee, Andraste, and call upon thee as woman speaking to woman [...] those over whom I rule are Britons, men that know not how to till the soil or ply a trade, but are thoroughly versed in the art of war and hold all things in common, even children and wives, so that the latter possess the same valour as the men. As the queen, then, of such men and of such women, I supplicate and pray thee for victory, preservation of life, and liberty against men insolent, unjust, insatiable, impious.
She is mentioned only once. She may be the same as Andate, mentioned later by the same source, and described as 'their name for Victory; i.e. the goddess Victoria. Thayer asserts that she may be related to Andarta also. The goddess Victoria is related to Nike, Bellona, Magna Mater, Cybele, and Vacuna—goddesses who often are depicted on chariots.