, Cecilia 1
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"The Earl's only recorded wife and the mother of his sons was a lady named in a charter by her eldest son, 'Cecilia filia Johannis.' No other designation of her has been found. It has been suggested that she was a Fraser, but there is no satisfactory evidence of this."
e-books, The Scots Peerage ed. Sir James Balfour Paul vol. 3 (1906).