Essex was probably named after her maternal grandfather the 1st Earl of Essex.
Essex | Walter Scott | Sir Walter Scott | James Earl Jones | Walter Cronkite | Prince Edward, Earl of Wessex | Louis Mountbatten, 1st Earl Mountbatten of Burma | Horatio Nelson, 1st Viscount Nelson | Herbert Kitchener, 1st Earl Kitchener | University of Essex | Walter Raleigh | Walter Benjamin | David Essex | Charles Cornwallis, 1st Marquess Cornwallis | Earl | 1st United States Congress | Frederick Roberts, 1st Earl Roberts | Bernard Montgomery, 1st Viscount Montgomery of Alamein | Earl of Derby | William Cecil, 1st Baron Burghley | Earl Warren | Walter Mondale | Earl of Pembroke | Robert Harley, 1st Earl of Oxford and Earl Mortimer | George Villiers, 1st Duke of Buckingham | Earl of Warwick | Walter Matthau | Walter Gropius | Thomas Wentworth, 1st Earl of Strafford | Edward Smith-Stanley, 14th Earl of Derby |
The Baronet was the fourth son of Walter Devereux, 1st Viscount Hereford by either his first wife Mary Grey or his second wife Margaret Garneys.
Walter Devereux was the eldest son of Sir Richard Devereux, who was admitted to the Order of the Garter on 20 February 1548 and died in the same year, in the lifetime of his father, Walter Devereux, 1st Viscount Hereford.
In 1523, the Baron was created a Knight of the Garter by Henry VIII of England alongside diplomat Thomas Boleyn, later Earl of Wiltshire.