Guy de Brian, III

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Guy de Brian, III

Birthplace: Walwyn's Castle, Pembrokeshire, Wales (United Kingdom)
Death: before July 26, 1307
Walwyn's Castle, Pembrokeshire, Wales (United Kingdom)
Immediate Family:

Son of Guy de Bryan (de Brien) (de Brian), of Walwyn's Castle and NN NN
Husband of Sibil de Sully
Father of Guy de Bryan, IV; Unknown Daughter de Bryan; Unknown Son de Bryan and Ela Bryan
Half brother of Maud de Brian

Managed by: Private User
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About Guy de Brian, III

Death date 1307, 1315, or 1345?

See Page 82 of A Genealogical History of the Dormant: Abeyant, Forfeited, and Extinct ... By Sir Bernard Burke— very clear that Maud was the only child Guy de Bryan had with Eve de Tracy.



Son of Guy de Brian b abt 1222 and unknown first wife was

Guy de Brian b abt 1250, d bef 26 Jul 1307. He md Sibyl de Sully abt 1270, daughter of Walter de Sully and Mabel de Somery. She was b abt 1256.

Child of Guy de Brian and Sibyl de Sully was:

  • Guy de Brian b 1283/84, d 17 Jun 1349. He md Alice de Holway abt 1302, daughter of William de Holway. She was b abt 1286, of Holwey, Devonshire, England.


Despite claims to the contrary, there is no connection between the Brian family and that of Brienne.


  • CP Vol III[4];
  • AR: Line 63A[30-31];
  • SGM: Jay Cary, Richard Borthwick.
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Guy de Brian, III's Timeline

Walwyn's Castle, Pembrokeshire, Wales
June 1, 1289
Pembrokeshire, Wales
Haverfordwest, Pembrokeshire, , Wales
July 26, 1307
Age 57
Walwyn's Castle, Pembrokeshire, Wales