English: Arms of w:William Parr, Marquess of Northampton (1513-1571), KG, the only brother of Queen Catherine Parr (1512-1548), the sixth and final wife of King Henry VIII, whom he married in 1543. On 23 April 1543, he became a Knight of the Garter and on 23 December 1543, just after his sister had married the king, he was created Earl of Essex. In 1547 he was created Marquess of Northampton. Coat of arms as seen on his Garter stall plate in St. George's Chapel, Windsor. The plate was formerly viewable online at the Royal Collection Trust website. (Sources:Tony Wilmott, Apethorpe Hall, Northamptonshire the Heraldic Decoration, 2009[1]) (see The Brooke Tomb, Cobham, Kent - Kent Archaeological Society[2]); Some notices of the Parr family may be found in the Topographer and Genealogist, vol. iii. p. 352

Quarterly of 11:

• 1: Parr: Argent, two bars azure a bordure engrailed sable
• 2: de Ros: Or, three water-bougets sable (Ross of Kendal, Westmorland, here shown with field argent)
• 3: FitzHugh: Azure, three chevrons interlaced in base or a chief of the last (Sir William Parr (1434–1483), KG, married w:Elizabeth FitzHugh (1455/65-1507), a daughter (and heiress) of Henry FitzHugh, 5th Baron FitzHugh (c. 1429–1472), of Ravensworth in North Yorkshire. The arms of FitzHugh (quartering Marmion of Tanfield Castle) impaling Neville (quartering Montacute and Monthermer) survive in a stained glass window in St Mary's Church, Wath-by-Rippon, Yorkshire.
• 4: Staveley: Barry argent and gules, a fleur de lys sable (an heiress of FitzHugh) Alice de Staveley, daughter and heiress of Adam de Staveley, married Ranulf son of Henry of Ravensworth, the ancestor of the family of Fitzhugh (https://www.staveley-genealogy.com/the_first_staveleys.htm);
• 5: Furneaux (of w:Carlton in Lindrick, Nottinghamshire): Gules, a bend between six cross-crosslets or (an heiress of FitzHugh) here shown as Gules, a bend between six cross-crosslets argent
• 6:Barry of six argent and azure, on a bend gules three martlets or (Grey of Wilcote, Oxfordshire, a difference of Grey of Rotherfield); John de Grey, 1st Baron Grey of Rotherfield (1300-1359) married firstly Catherine FitzAlan, by whom he had a son and heir John Grey, 2nd Baron Grey of Rotherfield. Secondly John de Grey, 1st Baron Grey of Rotherfield married Avice Marmion, one of the two sisters and co-heiresses of Robert Marmion, 3rd Baron Marmion (d.1360), of Tanfield, Nottinghamshire. By Avice Marmion he had two further sons: Sir John "de Marmion" of Tanfield, who became heir to his mother and adopted the surname "Marmion" in lieu of his patronymic; died without issue; the second son was Sir Robert de Grey (d.1367) of Wilcote, Oxfordshire (a Grey manor), who married Lora de St Quentin, younger daughter and co-heiress of Sir Herbert de St Quentin. Sir Robert de Grey (d.1367) of Wilcote appears to have adopted the martlets as a difference to his paternal arms (which descended to his elder half-brother John Grey, 2nd Baron Grey of Rotherfield). Sir Robert de Grey of Wilcote left an only daughter and sole heiress Elizabeth Grey (also heiress of her uncle Sir John "de Marmion" of Tanfield) who married w:Henry FitzHugh, 3rd Baron FitzHugh (c. 1358–1425).
• 7: Marmion: Vair, a fess gules (an heiress of Grey)
• 8: Gernegan of Tanfield: Barry or and azure, an eagle gules (an heiress of Marmion)
• 9: St Quentyn: Or, three chevronels gules a chief vair (an heiress of Grey)
• 10: Greene of Boughton, Northamptonshire: Azure, three stags trippant or ('Parishes: Boughton', in A History of the County of Northampton: Volume 4, ed. L F Salzman (London, 1937), pp. 76-81 [3]). The mother of William Parr, Marquess of Northampton was w:Maud Green (1492-1531), a daughter and co-heiress of Sir Thomas Green of Green's Norton in Northamptonshire and a close friend and lady-in-waiting to Queen Catherine of Aragon.
• 11: Mablethorpe: Gules, a chevron or between three cross-crosslets argent in chief a lion passant of the last (an heiress of Greene)

From: Tony Wilmott, Apethorpe Hall, Northamptonshire the Heraldic Decoration, 2009[4]: Quartered arms of William Parr, 1st Earl of Northampton (d. 1571), brother of Queen Katherine Parr. His quarterings appear on his Garter stall plate, and were probably those that appeared here: Quarterly of ten: (1) argent, two bars azure within a bordure engrailed sable (Parr), (2) or, three water boudgets sable (Roos), (3) azure, three stags trippant or (Greene), (4) gules, a chevron between three crosses crosslet, in chief a lion passant guardant or (Mablethorpe), (5) azure, three chevronels braced in base, and a chief or (Fitzhugh), (6) vair, a fess gules (Marmion), (7) or, three chevronels gules, a chief vair (St Quentyn), (8) gules, a bend between three crosses crosslet or (Forneux), 9) barry argent and gules, a fleur de lis sable (Staveley), (10) barry or and azure, ann eagle displayed gules (Garnegan)

Gregory Fiennes, Baron Dacre of the South (d.1594) displayed many of these quarterings: Dacre, Multon, Vaux, Morville, Fitzhugh, Stavely, Furneaux, Grey, Marmion, St. Quentin and Gernegan. Lord Dacre had no children, but his heraldry survives in the Arms of Emanuel School in Clapham[5] founded by his widow. (https://heraldictimes.wordpress.com/2010/12/06/elaboration-of-coats-of-arms/)