The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom @ Vol. III, p. 552; Vol. XII/1, p. 653
The cited information was published by Gloucester, England: Sutton Publishing Ltd., 2000 (Ref: Vol. III, p. 552; Vol. XII/1, p. 653) The author/originator was G. E. Cokayne.