Question: Who is the paternal grandfather of Robert De Brus, 4Th Lord Of Annandale?

Knowledge 1: Robert de Brus, 4th Lord of Annandale
Robert de Brus, "the Noble" (ca.1195–1245) was 4th Lord of Annandale.He was the son of William de Brus, 3rd Lord of Annandale and Christina or Beatrice de Teyden.Robert had the same name as both his uncle and his grandfather.His uncle died before becoming Lord of Annandale, so William became 3rd Lord of Annandale.Robert married ca.1219 Isobel of Huntingdon, the second daughter of David of Scotland, 8th Earl of Huntingdon, by which marriage he acquired the manors of Writtle and Hatfield Broadoak, Essex in England.They had his heir and successor, and a daughter:He died sometime between 1226 and 1233, and was buried in Gisborough Priory or in Sawtry Abbey. [SEP] Knowledge 2: William de Brus, 3rd Lord of Annandale
William de Brus, 3rd Lord of Annandale (died 16 July 1212), was the second but eldest surviving son of Robert de Brus, 2nd Lord of Annandale.His elder brother, Robert III de Brus, predeceased their father, never holding the lordship of Annandale.William de Brus thus succeeded his father when the latter died in 1194.William de Brus possessed large estates in the north of England.He obtained from John, King of England, the grant of a weekly market at Hartlepool, and granted lands to the canons of Gisburn.Very little else is known about William's activities.He makes a few appearances in the English government records and witnessed a charter of William the Lion, King of Scotland.He married a woman called Christina, and had by her at least two sons and one daughter:
Knowledge 1: William de Brus, 3rd Lord of Annandale
William de Brus, 3rd Lord of Annandale (died 16 July 1212), was the second but eldest surviving son of Robert de Brus, 2nd Lord of Annandale.His elder brother, Robert III de Brus, predeceased their father, never holding the lordship of Annandale.William de Brus thus succeeded his father when the latter died in 1194.William de Brus possessed large estates in the north of England.He obtained from John, King of England, the grant of a weekly market at Hartlepool, and granted lands to the canons of Gisburn.Very little else is known about William's activities.He makes a few appearances in the English government records and witnessed a charter of William the Lion, King of Scotland.He married a woman called Christina, and had by her at least two sons and one daughter: [SEP] Knowledge 2: Robert de Brus, 2nd Lord of Annandale
Robert II de Brus," le Meschin( the Cadet)"( fl. 1138, died or 1194), was a 12th- century Norman noble and 2nd Lord of Annandale.He was the son, perhaps the second son, of Robert de Brus, 1st Lord of Annandale.The elder de Brus' allegiances were compromised when David I invaded England in the later 1130s, and he had renounced his fealty to David before the Battle of the Standard in 1138.The younger Robert however remained loyal and took over his father's land in Scotland, whilst the English territories remained with the elder Robert and passed to the latter's elder son Adam de Brus, 2nd Lord of Skelton.Bruce family tradition has it that Robert II was captured by his father at the battle and given over to King Stephen of England.A legend tells that in the 1140s, Robert II was visited at Annan by St Malachy.St Malachy asked Robert to pardon a thief, but Robert hanged him anyway, and for this the River Annan destroyed part of his castle and the de Brus line received a curse from the holy man.Robert made Lochmaben the centre of his lordship and constructed a new" caput" there.He married Euphemia, daughter of Sir Adam de Crosebi or Crosbj of Albemarle( b c1098), and Cecily FitzDuncan( b c 1113).They had five known children:Robert was buried at Gisborough Priory in the North Riding, Yorkshire, England, a monastery founded by his father Robert I de Brus.As his eldest son, Robert, predeceased him, he was succeeded by his second son William.
Knowledge 1: Robert de Brus, 4th Lord of Annandale
Robert de Brus, "the Noble" (ca.1195–1245) was 4th Lord of Annandale.He was the son of William de Brus, 3rd Lord of Annandale and Christina or Beatrice de Teyden.Robert had the same name as both his uncle and his grandfather.His uncle died before becoming Lord of Annandale, so William became 3rd Lord of Annandale.Robert married ca.1219 Isobel of Huntingdon, the second daughter of David of Scotland, 8th Earl of Huntingdon, by which marriage he acquired the manors of Writtle and Hatfield Broadoak, Essex in England.They had his heir and successor, and a daughter:He died sometime between 1226 and 1233, and was buried in Gisborough Priory or in Sawtry Abbey. [SEP] Knowledge 2: Isobel of Huntingdon
Isobel of Huntingdon( 1199 – 1251), also known as Isobel the Scot, was the daughter of David of Scotland, 8th Earl of Huntingdon, grandson of David I of Scotland, and Matilda of Chester.She married Robert Bruce, 4th Lord of Annandale, and through her came the claims firstly of her son in 1290 and later in the beginning of 14th century of her great- grandson Robert Bruce, 7th Lord of Annandale, to the Scottish throne.Her above- mentioned son Robert Bruce, 5th Lord of Annandale was regent and recognized heir presumptive of Scotland in the years just before her death.

Answer: Robert de Brus, 2nd Lord of Annandale