Sir William de Percy, 3rd Baron Percy

William de Percy born about 1088 at Alnwick, Northumberland, England died 1174 or 1175, buried Fountains Abbey, Aldfield, North Yorkshire, England

Married:

1. Alice (Adeliza) de Tunbridge (Clare)

William de Percy and Alice (Adeliza) de Tunbridge had six children:

1. Walter de Percy, died young
2. Alan de Percy, born about 1128 Whitby, Yorkshire, England, died after 1166 Whitby, Yorkshire, England
3. Richard de Percy, died young
4. William de Percy, died young
5. Agnes de Percy, born 1134 Whitby, Yorkshire, England, died about 1205
6. Maud (Matilda) de Percy, born about 1136 Topcliffe, Yorkshire, England died 1203

William de Percy was the son of Allan (Algernon) de Percy and Emma de Gaunt (Gant).

William de Percy, 4th Baron Percy, at the age of 25 led a goodly band of Yorkshiremen to fight with King Stephen against the Scottish invaders. He was the last of the direct male line. He first married Adeliza de Tunbridge, daughter of Richard, 3rd Earl of Clare. They had Walter, Alan and Richard who died sine prole. William, the 4th son, was Abbot of Whitby, d. s. p. Maud, the eldest daughter, married William de Newburgh, who fell in the Crusades of 1184 without issue. She died 1203, aged 71, and bequeathed her half of her father's estate to her youngest nephew, Richard de Percy. Now such a bequest she had absolutely no right to make. Dying childless, her estates should have passed to her sister Agnes, who thus became the sole heir. But the Countess Maud was apparently a person of strong will and had moreover taken a fancy to her aforesaid nephew Richard, in whom she perceived something of the old doughty spirit of William Alsgernon. The eldest nephew, Henry de Percy, was already dead, and his son a young child, so that Maud found less difficulty in persuading her sister Agnes to covenant with her into a "family agreement" by which the great Percy estates should continue divided. This led later to serious complications, and gave Richard de Percy an excuse for usurping a title to which he had no right, that of Baron Percy. Having accomplished thus in favor of her nephew, Maud died and her sister and co-heir, Agnes de Percy, became the sole inheritor of the line which for five generations had lorded it over North Riding.

Links

Wiki (En) - Barons Percy

Rootsweb.ancestry.com

Sources

Mellcene Thurman Smith, Kin of Mellcene Thurman Smith, Privately published, pages 550 and 829.

MedLands

http://www.renderplus.com/hartgen/htm/de-percy.htm

2. William de Percy - was born in 1112 in Alnwick, Northumberland, England and died in 1168 and was buried in Fountains Abbey . He was the son of William "Algernon" de Percy and Emma de Port.
William married Alice de Tonbridge.

 Then William married Adelizia de Clare. Adelizia was born about 1115. She is the daughter of Earl Richard FitzGilbert de Clare and Alice de Mechines.

Children with Alice de Tonbridge (Quick Family Chart) i. Agnes de Percy was born in 1134 and died in 1204 . Agnes married Jocelin de Louvain. He was the son of Godfrey Barbatus. He died in 1180 .

Also had a child or children by one or more mistresses. No children with second wife Sibylla de Valoignes.