File:Arms Edward Seymour, 1st Earl of Hertford, Seymour (14 Quarters) Impaling Grey (of Groby) (16 Quarters) Salisbury Cathedral.xcf

Coat of arms of Edward Seymour, 1st Earl of Hertford (1539-1621), detail from his monument in Salisbury Cathedral. He was the eldest son of Edward Seymour, 1st Duke of Somerset (c.1500–1552) (by his second wife Anne Stanhope), eldest brother of Queen Jane Seymour, the third wife of King Henry VIII and uncle of King Edward VI. He married Lady Katherine Grey (1540-1568), a younger sister of Lady Jane Grey, the "Nine Days' Queen", and the second surviving daughter of Henry Grey, 1st Duke of Suffolk, by his marriage to Lady Frances Brandon, eldest daughter of Charles Brandon, 1st Duke of Suffolk, by his wife Princess Mary, younger sister of King Henry VIII.

Heraldry

Seymour quarterly of 14 impaling Grey quarterly of 16:
Dexter (baron):

• 1: Or, on a pile gules between six fleurs-de-lys azure three lions passant guardant or (Seymour (marriage augmentation))
• 2: Gules, two wings conjoined in lure or (Seymour of Wulfhall, Wiltshire)
• 3: Vair (Beauchamp of Hatch, Somerset)
• 4: Gules, a chief argent a label of three points of the field
• 5: Azure, three escallops or (Malet ?)
• 6: Party per pale or and vert, a lion rampant gules (Arms of William Marshal, 1st Earl of Pembroke)
• 7: Or, six lioncels sable 2,2,2 (Ferrers) (Papworth, John Woody, Alphabetical Dictionary of Coats of Arms Belonging to Families in Great Britain and Ireland, Vol.I, London, 1874, p.180; Burke, Sir Bernard, The General Armory, London, 1884, p.348)
• 8: Gules, three lions passant in pale argent (Giffard of Brimpsfield, Gloucestershire)
• 9: Azure, three garbs or (Arms adopted by Ranulf de Blondeville, 6th Earl of Chester (died 1232))
• 10: Or, two fesses dancetty gules (Harken ?) (Papworth, John Woody, Alphabetical Dictionary of Coats of Arms Belonging to Families in Great Britain and Ireland, Vol.I, London, 1874, p.18; Burke, Sir Bernard, The General Armory, London, 1884, p.456)
• 11: Esturmy
• 12: Barry of six ermine and gules (Hussey)
• 13: Macwilliam
• 14: Coker

Sinister (femme):

• 1: Grey of Groby, Leicestershire
• 2: Hastings
• 3: Valence
• 4: Astley
• 5: Vairy or and gules (Ferrers, Earl of Derby)
• 6: Gules, seven mascles or 3,3,1 Arms of Ferrers (of Groby) (De Quincy)
• 7: Gules, a cinquefoil ermine (Beaumont, Earl of Leicester)
• 8: Azure, three garbs or Arms of Ranulf de Blondeville, 6th Earl of Chester (died 1232):
• 9: Lupus, Earl of Chester
• 10: Woodville
• 11: Bonville
• 12: Harington
• 13: Barry of ten argent and gules, a lion rampant or ducally crowned per pale of the first and second (Brandon, Duke of Suffolk)
• 14: Lozengy ermine and gules (de la Rochelle / Rokele)
• 15: Azure, a cross moline or (le Bruyn of South Ockendon in Essex)
• 16: Azure, a fess or between three bezants