Among the insular Celts, there is a greater amount of historic documentation to suggest warrior roles for women. In addition to commentary by Tacitus about Boudica, there are indications from later period histories that also suggest a more substantial role for “women as warriors”, in symbolic if not actual roles. Posidonius and Strabo described an island of women where men could not venture for fear of death, and where the women ripped each other apart. Other writers, such as Ammianus Marcellinus and Tacitus, mentioned Celtic women inciting, participating in, and leading battles. Posidonius’ anthropological comments on the Celts had common themes, primarily primitivism, extreme ferocity, cruel sacrificial practices, and the strength and courage of their women.
Under Brehon Law, which was written down in early Medieval Ireland after conversion to Christianity, a woman had the right to divorce her husband and gain his property if he was unable to perform his marital duties due to impotence, obesity, homosexual inclination or preference for other women.
Classical literature records the views of the Celts’ neighbours, though historians are not sure how much relation to reality these had. According to Aristotle, most “belligerent nations” were strongly influenced by their women, but the Celts were unusual because their men openly preferred male lovers (Politics II 1269b). H. D. Rankin in Celts and the Classical World notes that “Athenaeus echoes this comment (603a) and so does Ammianus (30.9). It seems to be the general opinion of antiquity.” In book XIII of his Deipnosophists, the Roman Greek rhetorician and grammarian Athenaeus, repeating assertions made by Diodorus Siculus in the 1st century BC (Bibliotheca historica 5:32), wrote that Celtic women were beautiful but that the men preferred to sleep together. Diodorus went further, stating that “the young men will offer themselves to strangers and are insulted if the offer is refused”. Rankin argues that the ultimate source of these assertions is likely to be Posidonius and speculates that these authors may be recording male “bonding rituals”.
The sexual freedom of women in Britain was noted by Cassius Dio:
… a very witty remark is reported to have been made by the wife of Argentocoxus, a Caledonian, to Julia Augusta. When the empress was jesting with her, after the treaty, about the free intercourse of her sex with men in Britain, she replied: “We fulfill the demands of nature in a much better way than do you Roman women; for we consort openly with the best men, whereas you let yourselves be debauched in secret by the vilest.” Such was the retort of the British woman.