In my researches, I found some stuff you might find of interest. I wrote a little booklet on the Celts, and this is part of it:
The Celts were not patriarchal. Robert Graves has traced their ogham script back to Anatolia, and relates the original Celtic people to the remains of the neolithic matriarchies of the Near East. Since ancient Anatolia (now Turkey) was once called Galatia, and branches of the Celts were called Galateans, or Gauls, this connection makes sense. [btw, the Galatians in Turkey were the first Celts to be Christianized, as evidenced by Paul's letter to them in the New Testament.]
The Roman historian Tacitus wrote of the Celts: "Their wives are to every man the most sacred witness to his bravery. Tradition says that wavering armies have been rallied by women... they believe that the sex has a certain prescience, and they do not despise their counsels nor make light of their opinions."
The Celts did not believe in capital punishment. Their tribal councils were attended and often presided over by women, and their inheritance of property and also kingship was matrilineal. Their male leaders were elected, and they had a reputation for democratic practices. As the Celts moved into new areas, they assimilated much of the native Neolithic culture. Ancient pre-Celtic influences survived liberally among Celticized people in Ireland, Wales, Brittany and the Basque country.
In Celtic law and custom, women were relatively free and powerful. They enjoyed greater economic, social, and sexual autonomy than women in modern day Britain, France or America. The early Celtic Christian church was suspect to the Roman Catholic orthodoxy precisely because it was pro-woman -- women celebrated mass. Women priests, called conhospitae, administered the sacramental wine while the male priests distributed the wafers. St. Patrick and Roman Christianity finally ended Druidic worship in Ireland, but the Irish church retained much of its pagan mysticism. Wales and Ireland, even in medieval times, preserved Celtic language, art, and literature, including the visionary ollave and bardic tradition of the Goddess with its sacred tree-alphabet.
The tuath (tribe) was the basic political unit in Ireland, owning the land communally. Cattle, not land, was the basis of wealth and the medium of exchange. Women also owned herds. The ruler of the tuath was commonly a man, but the queen was entitled to one-third of all war booty. There were many famous queen warriors, like the British Queen Boudicca in 61 BC. Powerful legendary women, like Queen Maeve of Connaught, were undoubtedly based on real people.
Celtic women owned their own property and were free to choose their mates, or husbands. In marriage, women didnt enter legally into the mans family, but retained independent status and property. Desiring divorce, the woman simply took back her belongings and dowry. Marriage was not a religious ceremony, and there was no concept of adultery. There were even annual marriages, entered into by both women and men, in which both parties agreed to be bonded for one year; at the end of each year the bond was mutually renewed, or abolished. Polyandry was practiced by some tribes; children belonged to the tuath. Legal contracts were made by the wife independently of her mate, and women were often the economic heads of families, with daughters inheriting equally with sons. Celtic heroes were named after their mothers -- and heroism was not confined to men. When upper-status Celts officially mated, she gave him a fine horse and a sword -- and he gave her a fine horse and a sword. The mutual exchange of nobility was the ceremonial band.