List of Famous people named John

John Arbuthnott, 9th Viscount of Arbuthnott, DL, JP was a Scottish peer and soldier.

Sir John Smith or Smythe, of Westenhanger, Kent, was an English politician.

Admiral of the Fleet John Forbes, styled The Honourable from 1734, was a Royal Navy officer. After taking part in an expedition to Lisbon to support the Portuguese in the face of a Spanish threat, he saw action as captain of the third-rate HMS Norfolk at the Battle of Toulon during the War of the Austrian Succession. He was one of the few captains who really bore down on the enemy.

Colonel John Giffard (1602–1665), of Brightley in the parish of Chittlehampton, Devon, England, was a Royalist leader during the Civil War. Giffard commanded the Devon Pikemen at the Battle of Lansdowne in 1634, in which his 3rd cousin the Royalist commander of the Cornish forces Sir Bevil Grenville (1596-1643) was killed in heroic circumstances. Giffard's loyalty to the Royalist cause led to him being proposed in 1660 as a knight of the intended Order of the Royal Oak. He was personally known to the biographer John Prince (1643–1723) who included him as one of his Worthies of Devon. He was buried in Chittlehampton Church, where his small kneeling effigy survives on the base of the monument he erected in 1625 to his grandfather.

John Desmond Bernal was an Irish scientist who pioneered the use of X-ray crystallography in molecular biology. He published extensively on the history of science. In addition, Bernal wrote popular books on science and society, and he was also a communist activist.