Queen Meb was said also to have slaughtered her own husband and a band of his followers for having retreated prematurely from a battle. No statement regarding her looks.
Incidentally her name points out the problem of pronouncing Irish Gaelic names. I read in an .edu site that Yeats himself evidently mispronounced the name of Cuchulain.
I wish I could find a site that gave rules for pronouncing such names. I tried learning Irish, but after the second tape it speeded up so I could not understand it. I gave the books and tapes away;.