The House of York, whose emblem it was.
The White Rose. Cardinal de la Pole.
(1500-1558.) White Rose of England. So Perkin
Warbeck or Osbeck was always addressed by Margaret of Burgundy, the
sister of Edward IV. (*-1449.) Lady Catherine Gordon, given by James
IV as wife to Perkin Warbeck, was called “The White
Rose.” She married three times more after the death of
The White Rose of Raby. Cecily, wife of
Richard, Duke of York, and mother of Edward IV. and Richard III. She
was the youngest of twenty-one children.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894