Parents
Father: Earl William of Montacute-Salisbury
Born: 1234
Married: Unknown
Died: 1288
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Mother: Lady Bertha of Montacute-Salisbury
Born: 1236
Died: 1297
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Children:
1. Baron Simon I of Montacute (b.1255)
2. Lord John of Montacute (b.1257)
Note: William was summoned to attend the king into Gascogne against Alphonso X, King of Castile, who had usurped that province. The 41st of Henry III, 1257, he was summoned to be with the King at Chester on the feast day of St. Peter ad Vincula, well furnished with horse and arms, thence to march against Llewellyn ap Griffith, Prince of Wales.
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