From Jerripedia
- Alfred Nicolle de Gruchy (1866-1915) son of Josué (St H) and Jane, nee Deslandes; OV, formerly of the Colonial Medical Service and latterly Surgeon RN, buried at sea off the coast of Chile. Died as a result of heart failure.
- Charles Southwell de Gruchy MC (1890-1917) (Toronto), son of Philip and Eliza, née Marshall, of Jersey; Lieutenant, Canadian Field Artillery, died of wounds. Military Cross awarded for conspicuous gallantry in action. 'He displayed great courage and skill in establishing and maintaining communication under very heavy fire, thereby materially assisting in the success of the operations' (February 1917)
- Joshua Laverty de Gruchy (1866-1915) son of Noel and Anne, née Le Moignan; husband of Harriette Catherine, née Smith; Corporal, Canadian Infantry, ex-RMIJ, falsified age by some years when signing up, killed in action
- Snowdon William de Gruchy (1888-1918), son of David Philippe (St H) and Emma Marguerite Blampied; husband of Eleanor, née Phillips; Private, Middlesex Regiment, died as a result of active service
- Stanley Roberts de Gruchy (1893-1916) son of Walter Adolphus (St H) and Mary Ann Roberts; Private, Middlesex Regiment, died of dysentry
- Philip Stanley de Gruchy (1885- ) (St H) Private, Hampshire Regiment son of Philip Godfray and Susan Alice Clement
- Philip de Gruchy (1896- ) son of John and Mary Godfray; Rifleman, Royal Irish Rifles, wounded 1916; then served as Private, Royal Hampshire Regiment, again wounded in 1918
- William Philip de Gruchy MM (1893- ) son of Alfred (St C) and Lizzie Hodge; Rifleman, Royal Irish Rifles, wounded; afterwards served in the Hampshire Regiment. Presentation to Private de Gruchy at the Town Hall
- Adolphus de Gruchy (1866-1940) (St S), son of Charles and Elizabeth Baudains; Mercantile Marine
- Albert George de Gruchy (1899-1965) (Tr), son of Charles Albert and Mary Anne Bisson Austin; Aircraft Mechanic RAF, ex-RMIJ
- Alfred Charles de Gruchy (1895-2000) (St H), son of Alfred and Ada Le Scelleur; L-Cpl, 42nd Bn., Royal Highland Regiment of Canada. Took part in the Battle of Vimy Ridge, which he crossed three times. He lived in Montreal and served in Black Watch regiment. His son Francis was shot down over the Mediterranean in a Canadian bomber on 24 December 1942
- Arthur Albert de Gruchy (1879- ) (St H), son of David Philip and Emma Margaret Blampied; Stoker RN, HMS Furious
- Arthur John de Gruchy (1900- ) (St J), son of Arthur John and Alice Le Feuvre; RFC, Private RAF
- Aubin Ewald de Gruchy (1889-1939) (S Africa), son of Frederick Abram (Tr) and Mary, née Irish; Captain, Royal Flying Corps, later RAF
- Charles Albert de Gruchy (1885- ) (Tr), son of Charles Albert and Mary Ann Bisson Austin; Sapper RE, ex-RMIJ
- Charles Blampied de Gruchy (1895- ) (St S), son of David Philip and Emma Marguerite Blampied; Private, Canadian Infantry, wounded
- Charles William de Gruchy (1895- ) (St H), son of Charles George Mourant and Eliza Levinia Pirouet; Mercantile Marine
- Clarence Charles de Gruchy (1890- ) (Tr), son of John Romeril and Elizabeth Godeaux; Private, Hampshire Regiment
- David Philip de Gruchy (1873- ) (St H), son of David Philip and Emma Margaret Blampied; Private, Royal Defence Corps
- Edward Charles de Gruchy (1885- ) (St S), son of David Philip and Emma Margaret Blampied; Private, Canadian Labour Corps
- Edward Francis Renouf de Gruchy (1878- ) (St H), son of Edward and Louisa, husband of Emmeline Louisa; Gunner, Royal Garrison Artillery
- Francis Arthur Labey de Gruchy (1883-1970) (St P), son of Francois and Clara Elizabeth, née Labey; OV, formerly of the 19th, Hyderabad Regiment; Major, Russell's Light Infantry, Indian Army, (Mesopotamia campaign); acting Lieut-Colonel, on secondment to The Middlesex Regiment
- Francis Philip de Gruchy, MM (1882- ) (St H), son of Francis William and Jane Emma Gallichan; ex-RMIJ, Sergeant, Royal Garrison Artillery Presentation to Sergeant de Gruchy at the Town Hall
- Frank (Francis) de Gruchy (1887- ) (St H), son of Thomas Philip and Elizabeth Colback; Driver, Royal Horse Artillery
- Frederick de Gruchy (1867-1924) (St H), falsified age on joining, son of John and Maria Whittenbury; Sapper, 287th Field Company, Royal Engineers
- Frederick de Gruchy (1890-1964), son of the above (Reading) and Esther Georgina Henley; Royal Flying Corps (Royal Air Force). His only son, J F V de Gruchy, RN, lost his life in WW2
- Frederick de Quetteville de Gruchy (1886-1960), OBE, son of Frederick Abram, above, and Mary, née Irish and brother of Aubin Ewald; Hon Lieutenant, Royal Marines
- George de Gruchy (1855- ) (Tr), son of John and Susanne Le Sueur; Master, Mercantile Marine
- George Emans de Gruchy (1891-1967), son of Charles (Liverpool) and Elizabeth Emans; Cheshire Regiment
- George Winter de Gruchy (1881- ) (St H), son of Charles and Mary Ann Mourant; Private, RAOC
- Gordon Arthur de Gruchy (1887-1961) (St Mt), son of Charles and Sara Ann Richmond; Gunner, Royal Garrison Artillery
- Harold William de Gruchy (1892-1978) (St H), son of Abraham Peter and Emily Mary Pugsley; Captain, South Africa Defence Regiment
- Henry Eustace Bligh de Gruchy MC (1897-1981), son of Henry and Harriet, née Monck; Lieutenant (later Captain), King`s Shropshire Light Infantry. He was wounded by shrapnel in 1917, some of which was discovered by an x-ray many years later, and removed, and then had a "Gunshot wound to throat, bullet", (21 March 1918). He was awarded the Military Cross in February 1918: "For conspicuous gallantry and devotion to duty. He took command of his company in an attack after the company commander had been killed, led it through severe machine gun fire with great skill and captured the final objective"
- John Edgar de Gruchy (1888- ) (St H), son of Francis William and Jane Emma Gallichan; Private, Dorsetshire Regiment
- John Henry de Gruchy (1891- ) (Eng.), son of Edgar Joshua and Catherine Eliza Hewlett; Private, London Regiment, then of The King`s Royal Rifle Corps
- John Thomas de Gruchy (1888- ) (St S) son of John Thomas and Julia Belward Wyatt; Private RAOC
- John Wallace de Gruchy (1879- ) (Tr), son of John Philippe and Mary Ann Cabot; Private, RJGB
- Louise Hilda de Gruchy (1878-1964) (St H), daughter of Philippe Henry and Emma Elizabeth Le Quesne; as "de Grouchy": Sister, British Red Cross, (1914); Sister, Queen Alexandra`s Imperial Military Nursing Service Reserve, (1915-19), serving in Greece, Egypt and the United Kingdom. Matron, Ferox Hall (War) Auxiliary Hospital, Tonbridge (1920)
- Margaret Annie Violet Mary de Gruchy (1888-1971) (Eng) Acting Sister, Queen Alexandra`s Imperial Military Nursing Service Reserve, (1917-18), afterwards Sister. Acting Matron, serving in WW2; Gallantry medal: ARRC
- Mark Mattingly de Gruchy, (1894- ) (St H), son of Philip Mattingley and Louisa Jane Le Riche; Private, Hampshire Regiment, wounded
- Oliver John de Gruchy (1896-1980) (St My), son of Philip David and Clara Mary Le Gresley; ex-RMIJ, Gunner, Royal Garrison Artillery
- Oliver Williams de Gruchy (1889-1956), son of George Samuel (St My) and Ann Venables; Lieutenant, US Forces (Asst Military Attaché, The Hague, 1916); later Colonel, US Army
- Percival de Gruchy (1885-1950) (St H), son of Walter Thomas and Annie Mary Hallman; Gunner, Royal Garrison Artillery
- Percy Charles John de Gruchy, OBE, TD (1880-1953) (St H), son of Charles and Anna Le Boutillier; Lieutenant, (later Major), Canadian Army
- Percy John de Gruchy (1886-1969) (St Mt), son of Charles and Sarah Ann Richmond; Driver, RASC
- Philip Buesnel de Gruchy (1885- ) (St H), son of Edward and Louisa Buesnel; Private, Royal Fusiliers
- Philip Cuthbert de Gruchy (1892- ) (Toronto), son of Charles Henry and Annie Armour; Private, Canadian Army Medical Corps, gassed
- Philip George de Gruchy (1880-1972) (Tr), son of George Philippe and Mary Ann Matilda Richardson, of Le Câtel, Rozel; Trinity, First Officer, Mercantile Marine, ss Clan Macgillivray
- Philip Harold de Gruchy (1896-1987) (Can), son of John and Emma V. Tothill of Toronto; Lieutenant, 208th Irish Fusiliers, Canadian Expeditionary Force (France)
- Philip John de Gruchy (1886- ) (St My), son of Philip John and Mary Ann Eliza Brée; Private RASC
- Philip Laurens de Gruchy (1899- ) (St J), son of Philip Renouf and Eliza Jane Laurens; Gunner, Royal Garrison Artillery, wounded
- Philip Theophilus de Gruchy (1879- ) (St H), son of Philippe John de Quetteville de Gruchy and Matilda Jane Le Masurier, husband of Adele Traisnel; Private, Royal Garrison Artillery
- Ralph de Gruchy (1897-1980) (Tr), son of Philip Mattingley and Louisa Jane Le Riche; Private, Dorsetshire Regiment
- Richmond Percival de Gruchy (1888-1952) (St Mt) son of Charles and Sarah Ann Richmond; Mercantile Marine
- Rodney de Gruchy (1900- ) (St H), son of Philip Mattingley and Louisa Jane Le Riche; Private, Duke of Cornwall's Light Infantry
- Sidney de Gruchy (1882- ) (St H), son of Henry Francis and Eliza Ann Luce; Private, Australian Army Medical Corps. His eldest son, Cyril de Gruchy, was killed in action in WW2
- Thomas de Gruchy (1887- ) (St J) son of John and Mary Godfray; Driver, Royal Field Artillery
- Thomas Bernard de Gruchy (1879-1930), son of Thomas (Aus) and Catherine Casey; Serjeant, Australian Army
- Thomas John de Gruchy (1892-1926) (Eng.), son of Thomas John and Elizabeth A. Jeune, OV; Paymaster Lieutenant RNR, HMS Revenge
- Walter John de Gruchy (1896- ) (St L) son of John (St J) and Mary Godfray; Private, Hampshire Regiment
- William Arthur de Gruchy (1877-1937) (Aus), son of William Bateman of St Helier, Caulfield, Melbourne, Australia and Emma Thornton Read; Lieutenant, RFA (1914), then Captain, RAOC, (1916)
- William Charles de Gruchy (1880- ) (St J), son of John and Mary Godfray, husband of Clara Maud; Private, Machine Gun Corps
- William Charles Emans de Gruchy (1889-1965), son of Charles (Liverpool) and Elizabeth Emans; Private, Cheshire Regiment
