John Sykes was born on 25 May 1774. He served in the Royal Navy.
Entered Navy (1783)
VAdm B (1848)
Son of James Sykes. His father was a Navy Agent in London. First cousin of John Sykes and Thomas Sykes. Brother-in-Law of Richard Byron.
• As Midshipman on Discovery, 10 (Master and Commander George Vancouver), he took part in George Vancouver's Voyage to the North Pacific Ocean.
Marshall (Supplement - Part I, p. 1)