Celtic "The Children of Lir"
Swans are shape-shifters in Celtic myth
Pre-Christian Celtic gods of Tuatha Dé Danann a race of people said to have come to Ireland from four Cities in the north. Lebor Gabála Érenn (The Book of Invasions) compiled in the 11th Century tells how they arrived in 'dark clouds'. These people were attributed with supernatural powers and Lir was a Sea God and father of the legendary Manannán mac Lir