Agnes St. John was born circa 1278 to John de St. John (c1225-1302) and Alice FitzPiers (c1228-?) and died 11 June 1345 of unspecified causes. She married Hugh de Courtenay, 1st Earl of Devon (c1276-1340) 1292 JL . Ancestors are from England, France.


Offspring of Hugh de Courtenay, 9th Earl of Devon and Agnes St. John (c1278-1345)
Name Birth Death Joined with
Hugh Courtenay, 10th Earl of Devon (1303-1377) 12 July 1303 2 May 1377 Margaret de Bohun (1311-1391)

John Courtneay (c1305-c1349)
Eleanor Courtenay (c1309-c1330)
Robert Courtenay (c1309-c1334)
Thomas Courtenay (c1311-c1356)
Elizabeth Courtenay (c1313-)
Baldwin de Courtenay (Abt 1313-?)

Footnotes (including sources)

‡ General
  • Tudor Place



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