- Sir Arthur Onslow, 1st Baronet
- Richard Onslow, 1st Baron Onslow
- Foot Onslow
- Arthur Onslow
- George Onslow, 1st Earl of Onslow
- Thomas Onslow, 2nd Earl of Onslow
- Arthur Onslow, 3rd Earl of Onslow
- Arthur George Onslow, Viscount Cranley
- Thomas Cranley Onslow
- George Augustus Cranley Onslow
- Guildford Onslow (Guildford James Hillier Mainwaring-Ellerker-Onslow), m. Rosa Ann Onslow
- Arthur Edward Onslow (1815–1897)
- Charles Vere Townshend Mainwaring-Ellerker-Onslow (1848–1927)
- Arthur Guildford Onslow (1888–1943)
- Arthur Edward Onslow (1862–1927)
- Vivian Isidore Onslow (1888–1979)
- Arthur Charles Vivian Onslow (1920–1997)
- Robert Charles Vivian Onslow (1952–1990)
- Anthony Ernest Edward Onslow (b. 1955)
- David Peter Onslow
- Denzil Isidore Charles Onslow
- John M. Onslow
- Stuart John Onslow
- Dennis Raymond Onslow
- Andrew Martin Onslow
- Martin Andrew Onslow
- Matthew John Onslow
- Brian S. Onslow
- Neil Ian Onslow
- John M. Onslow
- Arthur Charles Vivian Onslow (1920–1997)
- Vivian Isidore Onslow (1888–1979)
- Charles Vere Townshend Mainwaring-Ellerker-Onslow (1848–1927)
- Arthur Onslow, 3rd Earl of Onslow
- Edward Onslow
- Thomas Onslow, 2nd Earl of Onslow
- George Onslow, 1st Earl of Onslow
- Richard Onslow (British Army officer)
- George Onslow (British Army officer)
- Rev. Arthur Onslow
- m1. Marianna Campbell
- Arthur Pooley Onslow
- Arthur Alexander Walton Onslow (ADB)
- James Macarthur-Onslow
- George Macarthur-Onslow
- Arthur Macarthur-Onslow (ADB)
- Denzil Macarthur-Onslow
- (Denzil) Ion Macarthur-Onslow (1928-2002), catering entrepreneur
- Lt. Col. Edward Macarthur-Onslow, DSO (1909-1980), aviator
- Annette Macarthur-Onslow (b. 1933), illustrator
- Denzil Macarthur-Onslow
- (Rosa) Sibella Macarthur-Onslow, CBE (1871-1943), charity & church worker (ADB)
- Alexander Onslow
- Arthur Alexander Walton Onslow (ADB)
- William Campbell Onslow, later Hughes-Onslow
- Douglas Arthur Onslow
- Arthur Loftus Onslow, High Sheriff of Montgomeryshire
- Douglas Arthur George Onslow, owned airplane Miss Kenya 1933-1937
- Richard Douglas Loftus Onslow
- Ralph Denzil Onslow, killed in Abermule train collision
- Guildford Denys Onslow, killed in Abermule train collision
- Douglas Arthur George Onslow, owned airplane Miss Kenya 1933-1937
- Francis Robert Douglas Onslow
- Arthur Loftus Onslow, High Sheriff of Montgomeryshire
- Douglas Arthur Onslow
- Richard Onslow
- m2. Caroline Mangles
- Henry John Onslow, later Hughes-Onslow
- Maj. Arthur Hughes-Onslow (1862-1915), k.a.
- Sir Geoffrey Henry Hughes-Onslow, KBE, DSC (1893-1971), Lord Lieutenant of Ayrshire
- Maj. Denzil Hughes-Onslow (1863-1916), k.a.
- Capt. Oliver Hughes-Onslow (1893-1972), Irish Guards, Royal Co. Archers
- Lt.-Cmdr. Reginald Hughes-Onslow, RN
- Maj. Arthur Hughes-Onslow (1862-1915), k.a.
- Charles Hamilton Onslow
- Pooley Onslow (d. 1810), m. Arthur Onslow (serjeant-at-law)
- Rev. Arthur Onslow
- Sir Richard Onslow, 1st Baronet
- Capt. Sir Henry Onslow, 2nd Baronet, RA
- Sir Henry Onslow, 3rd Baronet (nn)
- Maj. Sir Matthew Onslow, 4th Baronet, Bengal Cavalry
- m1. Eliza Wallace
- Capt. Sir William Onslow, 5th Baronet, High Sheriff of Cornwall
- m2. Caroline Bond
- Rev. Matthew Richard Septimus Onslow
- Capt. Richard Francis John Onslow, k.a. 1942 commanding HMS Hermes
- Thomas Onslow
- Col. Arthur Walton Onslow (1818-1895), Bengal Army
- Herbert Arthur Walton Onslow, RN
- Col. Gerald Charles Penrice Onslow, RE; see FA Cup Final 1875
- Lt-Cmdr. Arthur Gerald Onslow, DSC, RN, k.a. at Jutland commanding HMS Onslaught
- Lt. Brian Walton Onslow, k.a. 1915 at Gallipoli, ADC to Birdwood
- Richard Cranley Onslow (1857-1934), Deputy JAG India
- Capt. John James Onslow, RN (leader of the 1833 invasion of the Falkland Islands)
- Rev. William Lake Onslow (baptized Prince Alexander John of Wales; naval chaplain and later chaplain-in-ordinary to Edward VII as Prince of Wales, Fellow of the Royal Astronomical Society)
- Frances Onslow, m. Sir Hyde Parker (d. 1807)
- Anne Onslow, m. Francis Lake, 2nd Viscount Lake
- Capt. Sir Henry Onslow, 2nd Baronet, RA
- Arthur Onslow
- Rev. Richard Francis Onslow
- Richard Foley Onslow
- Capt. Andrew George Onslow
- Maj. George Arthur Onslow
- Admiral Sir Richard George Onslow KCB, DSO, DL (1904–1975), served WWII (ODNB)
- Maj. George Arthur Onslow
- Capt. Andrew George Onslow
- Richard Foley Onslow
- Rev. Richard Francis Onslow
- George Onslow (British Army officer)
- Arthur Onslow
- Sir Henry Onslow of Drungwick, ktd. 1664
- Richard Onslow (d. 1719)
- Denzil Onslow (of Stoughton) (d. 1765)
- Middleton Onslow (d. 1801)
- Maj.-Gen. Denzil Onslow
- Denzil Onslow
- Charlotte Onslow, m. George Newton of Coxton Park, then Craven Berkeley
- Rosa Ann Onslow, m. Guildford Onslow
- Maj.-Gen. Denzil Onslow
- Middleton Onslow (d. 1801)
- Denzil Onslow (of Stoughton) (d. 1765)
- Richard Onslow (d. 1719)
- Denzil Onslow (of Pyrford) (d. 1721)
Arthur Onslow (serjeant-at-law), married Pooley Onslow; of the distantly related Shropshire Onslows