(g soft). Wife of Count Palatine Siegfried, of Brabant, in the time of Charles Martel. Being suspected of infidelity, she was driven into the forest of Ardennes, where she gave birth to a son, who was nourished by a white doe. In time, Siegfried discovered his error, and restored his wife and child to their proper home.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894