E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
or Estrild. Daughter of a German king, and handmaid to the mythical King Humber. When Humber was drowned in the river that bears his name, King Locrin fell in love with Estrildis, and would have married her, had he not been betrothed already to Guendolna; however, he kept Estrildis for seven years in a palace under-ground, and had by her a daughter named Sabrina. After the death of Locrin, Guendalna threw both Estrildis and Sabrina into the Severn. (Geoffrey: British History, ii. ch. ii.-v.)