Question

How were Celtic women treated?

Answer 1

In a short answer, How were Celtic women treated?

Women had rights and were generally treated with respect.

Answer 2

I presume you mean ancient Celtic women as opposed to modern ones, today?
Celtic women had a lot of rights. They could own land, and there were many female warriors and chieftains. They were also free, which is more than could be said of most of their contemporaries in other countries.