Queen Mab is thought to be a degenerated (no, I mean this in a cultural way, not as a question of her character!) version of the Irish Queen Medb, from the Ulster Cycle. They share traits even aside from their names--both fierce queens of an otherworldly place (the Connacht of the Ulster Cycle is nothing if not fantastical), both incredably independant, both incredably sexual. Mab is said to have been married to Oberon, and Titiana's character may simply be a variation on Mab; Titiana and Oberon battled over who was more powerful, as did Medb and her husband Ailill.

Mab also appears in Peter Pan in Kensington Gardens.