File:Arms of William Parr, Marquess of Northampton formerly in Cassiobury House, Hertfordshire - Philadelphia Museum of Art.svg

Stained glass window, circa 1550, showing arms of Parr quarterly of 10, circumscribed by the Garter, formerly in Cassiobury House, Hertfordshire, built in 1546 by the scholar and diplomat Sir Richard Morrison (c.1513-1556). These are the arms of w:William Parr, Marquess of Northampton (1513-1571), KG, as shown on his Garter stall plate, 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. The house was demolished in 1927, when many of the fittings were sold. This panel was given in 1952 to the Philadelphia Museum of Art by Mrs. Widener Dixon. See: corpusvitrearum.us [1]

Heraldry

Quarterly of 10 (the first 6 quarters are not arranged conventionally, but as on his Garter stall plate (Notice of a Stall-plate of Sir William Parr, K.G., Marquis of Northampton. Franks, Augustus W.  Archaeologia : or Miscellaneous tracts relating to antiquity, 1770-1992; London Vol. 36, (Jan 1855): 214-220[2]):

• 1: Parr: Argent, two bars azure a bordure engrailed sable
• 2: de Ros of Kendal, Westmorland: Or, three water-bougets sable (Sir William Parr (d.1404) married the heiress Elizabeth de Ros (d.1395), grand-daughter and heiress of Thomas de Ros (d.1390), feudal baron of Kendal (Sarah Rose, The Barony of Kendal, Victoria County History of Cumbria Project, Draft parish/township histories[3]). William Parr, Marquess of Northampton, died possessed of "The lordship, manor, castle & park of Kendal". However Parr’s widow obtained Kendal as her dower, and exchanged it shortly after 1572 with Queen Elizabeth I.
• 3 (beneath Parr): 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 [4]). 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.
• 4 (beneath de Ros): Mablethorpe: Gules, a chevron or between three cross-crosslets argent in chief a lion passant of the last (an heiress of Greene)
• 5: 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.
• 6: Marmion: Vair, a fess gules Marmion of Tanfield Castle (alias "Marmion Tower"), West Tanfield, Yorkshire (an heiress of FitzHugh)
• 7: St Quentyn: Or, three chevronels gules a chief vair (an heiress of FitzHugh)
• 8: Furneaux (of w:Carlton in Lindrick, Nottinghamshire): Gules, a bend between six cross-crosslets or (an heiress of FitzHugh)
• 9: Staveley: Barry argent and gules, a fleur de lys sable (an heiress of FitzHugh)
• 10: Gernegan: Barry of ten or and azure, an eagle displayed gules (Gernegan of Tanfield, Yorkshire, an heiress of Marmion); Jernegan/Garnegan/Gernegan/Garnegott/Gernagon/FitzGernagon "of Tanfield, (in the Honour of) Richmond" (Yorkshire) (Papworth, John Woody, Alphabetical Dictionary of Coats of Arms Belonging to Families in Great Britain and Ireland, Vol.I, London, 1874, p.299); of Tanfield Castle (alias "Marmion Tower"), West Tanfield, Yorkshire. An obscure family, much research on "Gernegan" has been performed by the blog "Crimsons History, Digging down to the truth", who seems to have settled on the spelling "Gernegan"[5]