English: Coat of arms of Sir w:Henry Sidney (1529-1586), KG, Lord Deputy of Ireland, based on an illustration of his ams in Arms of the Knights of the Garter (3 D 14,folio 236B). He was the eldest son of Sir William Sidney of Penshurst in Kent (by his wife Anne Pakenham), a prominent politician and courtier during the reigns of Henry VIII and Edward VI, from both of whom he received extensive grants of land, including the manor of Penshurst, which became the principal residence of the family. He married Mary Dudley, eldest daughter of John Dudley, 1st Duke of Northumberland, by whom he had issue including Sir Philip Sidney, and (second son) Robert Sidney, 1st Earl of Leicester. His daughter, Mary Sidney, married Henry Herbert, 2nd Earl of Pembroke, and by reason of her literary achievements, was one of the most celebrated women of her time.

Quarterly of 8:

• 1: Or, a pheon point down azure (Sydney)
• 2: Argent, two fesses and in chief three escutcheons sable (Clunford/Clumford/Clunfold/Clowfield). William Sydney (fl.1394/1428) married Alice/Agnes Clunford/Clumford/Clunfold/Clowfield (daughter and heiress of John Clunford/Clumford/Clunfold/Clowfield of ..... ?) by whom he was the father of William Sydney (d.1449), MP for Sussex in 1433 ("Clowfield", per Burke, Sir Bernard, The General Armory, London, 1884, p.206, "Clowfield", per Papworth, John Woody, Alphabetical Dictionary of Coats of Arms Belonging to Families in Great Britain and Ireland, Vol.I, London, 1874, p.25) (For pedigree of Sydney see: William Berry, Pedigrees of the Families in the Country of Sussex. London: Sherwood, Gilbert , and Piper, 1830, p.298[1]; see also: A Genealogical Enquirer. "Pedigree of Sidney of Sussex". The Gentleman's Magazine: from January to June 1832. London: J B Nichols and Son, 1832. Vol CII, Part I, p.604[2])
• 3: Argent, three chevrons gules a label of three points azure for difference (Barrington)
• 4: Argent, on a bend gules three lozenges of the field (Mercy) (Burke, Sir Bernard, The General Armory, London, 1884, p.678)
• 5: Quarterly or and gules, an escarbuncle sable (Mandeville (of Clonmel, Tipperary)) (Burke, Sir Bernard, The General Armory, London, 1884, p.655)
• 6: Azure, a chevron between three mullets or (Chetwynd)
• 7: Argent (semée of crosses-crosslet sable), three lions rampant gules (Bellhouse) (Burke, Sir Bernard, The General Armory, London, 1884, p.69 "Bellhouse of Essex")
• 8: Barry of ten argent and gules, a lion rampant or ducally crowned per pale of the first and second (Brandon)