Third Generation  

6. 1st Earl William MARSHALL of Pembroke [81930] (John I of Rockley [le Mareschal]², Gilbert FitzRobert le Mareschal¹) was born on 12 May 1146 in Rockley Wiltshire England, died on 14 May 1219 in Caversham Oxfordshire England at age 73, and was buried in Round Chapel of Knights Temple London Middlesex England.

William married Countess Isabel de CLARE of Pembroke [81931]. Isabel was born in 1171 in Pembroke Pembrokeshire Wales, died on 9 Mar 1220 in Pembroke Pembrokeshire Wales at age 49, and was buried in Tintern Abbey Monmouthshire Wales.

General Notes: Wikipedia says,
Isabel de Clare, suo jure 4th Countess of Pembroke and Striguil (c. 1172 - 11 March 1220), was a Welsh and Irish noblewoman and one of the wealthiest heiresses in Wales and Ireland.[1] She was the wife of William Marshal, 1st Earl of Pembroke, who served three successive kings as Marshal of England. Her marriage had been arranged by King Richard I.
AND,
The new King Richard I arranged her marriage in August 1189 to William Marshal, regarded by many as the greatest knight and soldier in the realm. Henry II had promised Marshal he would be given Isabel as his bride, and his son and successor Richard upheld the promise one month after his accession to the throne. At the time of her marriage, Isabel was residing in the Tower of London in the protective custody of the Justiciar of England, Ranulf de Glanville.[5] Following the wedding, which was celebrated in London "with due pomp and ceremony",[5] they spent their honeymoon at Stoke d'Abernon in Surrey which belonged to Enguerrand d'Abernon.[8]

Marriage to Isabel elevated William Marshal from the status as military captain and knight into one of the richest men in the kingdom. He would serve as Lord Marshal of England, four kings in all: Henry II, Richard I, John, and Henry III. Although Marshal did not become Earl of Pembroke until 1199 - a revival of the title by King John as an act of favour - he nevertheless assumed overlordship of Leinster in Ireland and the Marcher lordships of Chepstow and Usk with Isabel's many other estates in several English counties, which belonged to her father's and her own earldom of Striguil.

Marshal and Isabel did not sail to Ireland till 1200, after taking possession of Pembroke. He left her behind him on his return to England.[9] She may have ruled Leinster in his absence till as late as 1203, with as her seneschal a Wiltshire knight, Geoffrey fitz Robert, who was married to Isabel's aunt, Basilia, a sister of Strongbow.[10] Isabel is credited with playing a major part at this time in the foundation of the borough known as New Ross.[11] Isabel was again left to rule Leinster in 1207-8 during her husband's house arrest at the court of King John when, though pregnant, she successfully led the campaign which defeated the rebel barons of the province.[12]

The marriage was happy, despite the vast difference in age between them. William Marshal and Isabel produced a total of five sons and five daughters.

Children from this marriage were:

   10    i. 2nd Earl William MARSHALL of Pembroke [122696] was born in May 1190 in Normandy France, died on 6 Apr 1231 in Fawley Berkshire England at age 40, and was buried in Temple Church London Middlesex England.

   11    ii. 3rd Earl Richard MARSHALL of Pembroke [122697] was born in 1191 in Pembroke Pembrokeshire Wales, died on 16 Apr 1234 in Kilkenny Castle Co. Kilkenny Ireland at age 43, and was buried in kilkenny Co. Kilkenny Ireland.

+ 12    iii. Maud Matilda MARSHALL Countess Of Norfolk [81973] was born in Sep 1192 in Pembroke Pembrokeshire Wales, died on 27 Mar 1248 in Tintern Monmouthshire Wales at age 55, and was buried in Tintern Abbey Monmouthshire Wales.

   13    iv. 4th Earl Gilbert le MARSHALL of Pembrok [Knight Templar] [122908] was born in 1194 in Hertfordshire England and died about 27 Jun 1241 in Hertford Hertfordshire England aged about 47.

+ 14    v. Countess Isabel MARSHALL of Cornwall [122681] was born on 9 Oct 1200 in Pembroke Pembrokeshire Wales, died on 15 Jan 1240 in Berkhampstead Hertfordshire England at age 39, and was buried in Beaulieu Abbey Hampshire England.

   15    vi. 6th Earl Anselm MARSHALL of Pembroke [122909] was born about 1202 in Pembroke Pembrokeshire Wales, died on 22 Dec 1245 in Chepstow Monmouthshire Wales aged about 43, and was buried in Tintern Monmouthshire Wales.

+ 16    vii. Eva MARSHALL [81927] was born in 1203 in Pembroke Pembrokeshire Wales and died in 1246 in Llanthony Monmouthshire Wales at age 43.

   17    viii. 5th Earl Walter MARSHALL of Pembroke [122910] was born about 1206 in Pembroke Pembrokeshire Wales, died on 24 Nov 1245 in London Middlesex England aged about 39, and was buried in Tintern Abbey Monmouthshire Wales.

+ 18    ix. Countess Sibyl MARSHALL of Derby [122911] was born in 1209 in Pembroke Pembrokeshire Wales, died on 27 Apr 1245 in Ashbourne Derbyshire England at age 36, and was buried in Tintern Abbey Monmouthshire Wales.

   19    x. Lady Joan MARSHALL Swanscombe [122912] was born about 1210 in Pembroke Pembrokeshire Wales and died in Nov 1234 in Pembroke Pembrokeshire Wales aged about 24.