(3 syl.). The wicked mother of Alla, King of Northumberland.
Hating Cunstance because she was a Christian, she put her on a
raft with her infant son, and turned her adrift. When Alla
returned from Scotland and discovered this cruelty of his
mother, he put her to The tradition of St. Mungo resembles the
Man of Lawes Tale in many respects. Source: Dictionary of Phrase
and Fable, E. Cobham Brewer, 1894 More on Donegild from
Infoplease: