- Celtic mythology originated from various Celtic groups including the Gaels, Gauls, Britons, Irish and Galatians between the 7th-3rd centuries BC.
- Irish mythology is recorded in texts like The Book of Invasions which describes a sequence of groups who invaded Ireland and displaced earlier tribes like the Partholonians, Nemedians, Fir Bolg, and Tuatha De Danann.
- The Tuatha De Danann were a tribe of gods who were equivalent to the Greek Olympians. Prominent gods included Dagda, Brigid, Angus Og, Nuada, and Lugh. Mythological figures and the Otherworld also feature prominently in Celtic mythology