No legion, she was the real thing! There is a great book about her - Grace O Mally, last fien of Connimara - one of the great women of Ireland. My favorite event in her life was, when returning from the court of Queen Elizabeth Tudor, she stops at the home of the Lord of Howth and demands hospitality, he turns down the barefoot Fien, dressed in Ermine - so she goes back to her ships, gets her retainers, they sack the castle and carry off his son. He gets as much gold as he can carry, goes off the Galway or Mayo, to find her (she had castles all over the place from Galway to Mayo) and finding her asks how much to get his son back. She tells him that he must set a place for a stranger at every meal in Howth castle, he agrees and gets his son back for nothing more than that. I am told that to this day, that place is reserved at Howth castle for anyone who comes to the door at meal time.
All the best
Larry