Bébinn /bɛˈviːn/ a.k.a. Bé Binn, is an early Irish name applied to a number of related and unrelated figures in Irish mythology. In some sources Bébhinn (old orthography: Béḃinn) is a goddess associated with birth and the sister of the river-goddess, Boann. Bébinn is also described as being an underworld goddess in both Irish and Welsh mythology, inhabiting either the Irish underworld Mag Mell or the Welsh Annwn, although it is unknown which is the original source.
The name Bébinn seems to be a combination between medieval forms of the Irish Gaelic word for "woman", "bean" (pronounced "bahn"), and the adjective "melodious", "binn", literally translating to "melodious woman". Other versions of the name, such as Béfionn, instead pair "woman" with "fair". Variant forms include Bé Bind, Bé Find, Bé Binn, Bebhinn, Bébhinn, Bébhínn, Bébhionn, Bébind, Béfind and Béfionn. While it has also been Anglicized as Vivionn and Vivian, it is unrelated to the French or English names. In eighteenth-century Scottish writer James Macpherson's epic Ossian poems, the name appears as Vevina.
Bébinn is alternately described as either the wife of Áed Alainn, a god, or Idath, a mortal man. She is mentioned in multiple sources as the mother of Connacht hero Fráech, the main character in the Táin Bó Fraích. In the Fenian Cycle of Irish tales, Bébinn is "a beautiful giantess of aristocratic bearing" who seeks protection from the Fianna when an ugly giant pursues her. In other sources a Bébinn is mentioned as a daughter of Elcmar.