In Welsh mythology, Efnysien or Efnisien was the son of Penarddun and Euroswydd. His twin was Nisien. Welsh mythology, the remnants of the mythology of the pre-Christian Britons, has come down to us in much altered form in medieval Welsh manuscripts such as the Red Book of Hergest, the White Book of Rhydderch, the Book of Aneirin and the Book of Taliesin. ... In Welsh mythology, Penarddun was the wife of Llyr. ... In Welsh mythology, Nisien was the son of Penarddun and Eurosswydd and twin of Efnisien. ...

His half-sister, Branwen, was courted by an Irishman named Matholwch, who gave her brother, Bran, horses to curry favor. Efnysien mutilated the horses; Matholwch was irate until Bran gave him a cauldron which restored the dead to life. In Welsh mythology, Branwen was a daughter of Llyr and Penarddun and has been interpreted as a goddess of love and beauty. ... Matholwch was an Irish lord in Welsh mythology. ... Bran the Blessed, also known as Bran Vendigaid, Bendigeidfran or Branovices, is a giant and king of Britain in Welsh mythology. ...

Branwen, was treated cruelly by her husband, Matholwch. Bran sailed from Wales to Ireland to rescue her with his brother, Manawydan. When Matholwch saw the giant, he asked for peace and built a house big enough for him. Matholwch agreed to let Bran live with them and give the kingdom to Gwern, his son by Branwen. The Irish lords didn't like the idea, so they hid themselves in flour bags to attack the Welsh. Efnysien guessed what was happening and dispatched them one by one, fumbling around the flour sacks until he found each warrior's head and strangled them. Later that same evening, at a feast, he finally sparked a war between the Irish lords and the Welshmen when, in an act of betrayal, he threw his nephew Gwern headfirst into a fire. In Welsh mythology, Branwen was a daughter of Llyr and Penarddun and has been interpreted as a goddess of love and beauty. ... Matholwch was an Irish lord in Welsh mythology. ... This article is about the sub-division of the United Kingdom. ... In Welsh mythology, Manawydan, son of Llyr, is the equivalent of the Irish Manannan mac Lir and a presumed sea god. ... In Welsh mythology, Gwern was a son of Branwen and Matholwch. ...

In the ensuing war, Efnysien died. Bran mortally wounded and instructed his men to cut off his head (which survived the ordeal by some feat of magic) and take it back to Wales. Efnysien threw himself in the cauldron earlier given to Matholwch, which broke; he stayed dead. Branwen went to Aber Alaw and died there. Bran's head, still alive, was buried in England. Legend said that as long as the head was there, Wales (the land of the Mighty) would live on. This article needs to be wikified. ... Motto (French) God and my right Anthem No official anthem - the  United Kingdom anthem God Save the Queen is commonly used England() – on the European continent() – in the United Kingdom() Capital (and largest city) London (de facto) Official languages English (de facto) Unified  -  by Athelstan 927 AD  Area  -  Total 130...

In some print editons of the Mabinogion, his name is spelled in an English transliteration of its Middle Welsh form, "Evnissyen". The Mabinogion is a collection of prose stories from medieval Welsh manuscripts. ... Middle Welsh (Cymraeg Canol) is the label attached to the Welsh language of the 12th to 14th centuries, of which much more remains than for any earlier period. ...