William Hay, 1st Earl of Erroll (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "William Hay, 1st Earl of Erroll" in English language version.

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1books.google.com

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archive.org

Mackintosh, John (1898). Historic Earls and Earldoms of Scotland. W. Jolly.

books.google.com

Burke, John (1845). A Genealogical and Heraldic Dictionary of the Peerage and Baronetage of the British Empire. p. 374.