Splendid Mane, Enbarr, and Aonbharr are three different names for one horse. Manannan's horse! Not only can Enbarr gallop along water at breathtaking speeds as if it were on land, but no rider has met their death while on her back. Lugh, the foster son of Manannan, often had the privillage of riding this fine steed.
Manannan is also connected to horses through his Welsh equivilent, Manawydan, who was married to the horse goddess Rhiannon.