The Morrígan
The Morrígan was a tripartite battle goddess of the Celts of Ancient Ireland and Scotland. She was known as the Morrígan, but the different sections she was divided into were also referred to as Nemain, Macha, and Badb (among other, less common names), with each representing different aspects of combat. She is most commonly known for her involvement in the "Táin Bó Cúailnge".