Mrs Platts proposed a line of descent as follows:

        Roger de Berkeley, the first architect of Berkeley Castle, protègé and either brother-in-law or nephew of Earl William fitz Osbern, m Rissa dtr of Agnes, Countess of Ponthieu, by Robert de Montgomery, elder brother of Roger Arundel [see above] and sister of William Talvas, Count of Ponthieu, (whose son Robert went to Scotland with Walter fitz Alan, founder of the Stewarts, acquired the barony of Eaglesham and founded the Scottish line of Montgomery), and had an eldest son, Roger de Berkeley, who continued the building of Berkeley Castle, and at least one other son, John de Berkeley, who went north with Queen Maud.
        John de Berkeley had an eldest son, Sir Walter de Berkeley, who m Eva, dtr of Ughtred of Galloway by Gunnilda of Allerdale (granddaughter of Gospatrick, Earl of Northumberland). His dtr Margaret m Sir Alexander de Seton. At this time there appear to be several Berkeleys well established, all of which would be either brothers, sons or nephews of John de Berkeley. Various charters give their names as Walter, William, Humphrey, Robert, Theobald and Richard, and the first two of these held the office of Great Chamberlain of Scotland.
        While the continuity of the family is illustrated by the succession of their estates, and of their arms, the exact link between the John de Berkeley who went north with Maud, and the succeeding Chiefs of the Name of Barclay, is yet to be determined with certainty. The Gartly line was reasonably well documented down to the 17th century, and the Barclays of Mathers and Urie, of which the founders of Barclays Bank are cadets, down to the present day. On the expiry of the Gartly line the representation of the family passed to the Barclays of Tollie, and the Chief of the Name, Peter Charles Barclay of Towie Barclay and of that Ilk, matriculated his arms in 1971.
        According to family tradition, Roger, mentioned in Domesday Book as Provost of the Manor of Berkeley under Earl William fitz Osborn, had a son, John, who went to Scotland in the train of Queen Margaret, ca 1069, and became Laird of Towie (in the Parish of Turriff, Aberdeenshire). He had two sons, Walter, who m the heiress of Gartley, and Alexander, ancestor of the line of Towie (and the Barclays of Crawfordjohn, Kilburnie, Brechin and Collairnie). The descent can be proved from Sir Walter, said to have been 3rd of Gartley, grandson of Walter and the heiress of Gartley. He was Chamberlain of Scotland, 1165­1189, and was succeeded by his brother Theobald's sons, Humphrey (dspm 1225) and John as 4th and 5th of Gartley. The son of John, 5th of Gartley was:

Sir Robert, 6th of Gartley, who was father of:

Sir John, 7th Laird, who signed the Ragman Roll, 1296, and whose son was:

Sir Walter de Berkeley, 8th of Gartley, who also signed the Ragman Roll, did homage at Berwick 28 Aug 1296, was appointed Sheriff of Banff by King Edward I of England, Sep 1305, and had issue, a son:

Andrew, 9th of Gartley, who supported King Robert I, and was executed by the English after a raid into Yorkshire in Oct 1322. He left issue two sons:

Sir John, 10th of Gartley, ancestor of the later Gartley line and of the Barclays of Kynnaroquhy and Cairness, married  Margaret, widow of Hugh, Earl of Ross (who by her had a daughter Euphemia, wife of King Robert II), and daughter of Sir John Graham of Old Montrose. In 1321 he witnessed, as John de Berkeley of Grantoly, the grant by Sir William Keith, Marischal of Scotland, of the lands of Mathers to his brother.  He is traditionally assumed to be the direct ancestor of:  Alexander de Berkeley, below