Bear it mind that Celt marriage wasn't necessarily about increasing the population, they weren't monogamous. It was about sharing and dividing ownership. They w

Bear it mind that Celt marriage wasn't necessarily about increasing the population, they weren't monogamous. It was about sharing and dividing ownership. They were merchants (mostly), women could be richer and earn more than the man they married, and one type of marriage handled that case (because the divorce was handled differently depending on who owned/earned the most). Marriage might have been about reproduction in civilization with huge gender gap, but for Celts it do seems it wasn't. Just look at causes for divorce in Celtic law, disrespect is clearly more represented than fertility. Maybe it was due to the polygamous nature, idk. Celt priests were druids and did not left a lot. Druidism was an oral, masculine tradition, handled birth and death, as well as medecine. They might have been involved, but we can't know, because they left no texts. The laws we found however were quite clear about administrating a marriage, and did not require the presence of a druid. I'm not sure Celt gods can represent civil aspect like greco-roman gods did (justice, city, household). At most they were fertility and healing, but like I said, marriages weren't about fertility (they even had concubinage contracts, for how children outside marriage will receive resources).