Cook Family Ancestry Mary Percy Baroness of Ros [3965] This title is just so we know which tree we are working in, as there are many families represented here.

Henry de Percy 2nd Baron Percy [2965]
(1300-1351)

Idoine de Clifford [2966]
(Abt 1303-1365)

Henry of Lancaster Plantagenet 3rd Earl of Lancaster [5390]
(1281-1345)

Maud Chaworth [4428]
(Abt 1282-Bef 1322)

Henry Percy 3rd Baron Percy [2967]
(1320-1368)

Mary Plantagenet Baroness Percy [3963]
(1321-1362)

Mary Percy Baroness of Ros [3965]
(1360-1395)

Family Links

Spouses/Children:
John Ros Lord Ros [11861]

Mary Percy Baroness of Ros [3965] ²⁴ ^,25

Born: 1360
Marriage: John Ros Lord Ros [11861]
Died: 1395 at age 35

bullet General Notes:

Weir indicates that Mary was her mother as does The Complete Peerage.
Some sources show Joan de Oreby as the mother.
http://www.hull.ac.uk/php/cssbct/cgi-bin/gedlkup.php/n=royal?royal17120

Mary married John Ros Lord Ros [11861] [MRIN: 5418].

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Mary Percy Baroness of Ros [3965] 24,25

Mary Percy Baroness of Ros [3965] ²⁴ ^,25