269226 Chief Engine Room Artificer 1st Class Alfred Edward Wakley of the Royal Navy, HMS Indefatigable. Son of Mr. and Mrs. H. T. Wakley; husband of Lily Kate (née Batten). Born in Jersey (CI) 21 May 1875. Died 31 May 1916 aged 41. 

204028 Gunner Albert Thomas Walker of the Royal Navy, HMS Indefatigable. Husband of Violette (née Woods) of 104 Embankment Rd., Plymouth. Born in Portsmouth in 1883. Died 31 May 1916 aged 33.

K1475 Leading Seaman John Wallen of the Royal Navy, HMS Defence.  Son of John and Agnes Wallen of 21 Cabot St., Bristol. Born in Newton Abbot 20 September 1890 - later moved to Bristol. Died 31 May 1916 aged 25. 

J771 Able Seaman Leonard Charles James Ward of the Royal Navy, HMS Indefatigable. Son of Charles and Emma Ward (née Walkey). (His father was a Chief Petty Officer). Born in Plymouth 8 December 1890. Died 31 May 1916 aged 25.

303183 Stoker 1st Class Ernest Ware of the Royal Navy, HMS Defence. Son of John and Elizabeth Ware of 67 Well St., Great Torrington. Born in Torrington 4 May 1882. Died 31 May 1916 aged 34.

J10330 Able Seaman Alfred Charles Warren of the Royal Navy, HMS Indefatigable. Son of William and Mary Warren of 14A Ross St, Devonport; husband of Pollie (née Radmore). Born in Devonport 4 January 1895. Died 31 May 1916 aged 21. 

K9262 Stoker 1st Class Thomas Warrey of the Royal Navy, HMS Indefatigable. Son of Richard and Matilda of 5 Monument St., Devonport. Born in Stoke Damerel 26 September 1892.  Died 31 May 1916 aged 23. 

PLY15635 Private Patrick Watts (he used Patrick as a first name - baptised with the Biblical name of Parmenus) of the Royal Marine Light Infantry, attached to HMS Indefatigable. Son of George and Susan Watts of 13 East St., Newton Abbot. Born in Newton Abbot in the March Quarter of 1892. Died 31 May 1916 aged 24.

344063 Shipwright 1st Class Henry John Rattenbury Way of the Royal Navy, HMS Indefatigable. Son of William and Mary Ann Way; husband of Mary Way of 14 Ridgeway Terrace, Chudleigh Road, Kingsteignton. Born in Kingsteignton 3 August 1877. Died 31 May 1916 aged 39.

271444 Engine Room Artificer 2nd Class John Henry Webb of the Royal Navy, HMS Defence. Son of William and Elizabeth; husband of Kate of Sea View House, St. Andrews St., Cawsand, Plymouth. Born 4 October 1880. Died 31 May 1916 aged 35. 

K29037 Stoker 2nd Class Henry Webber of the Royal Navy, HMS Defence. Son of Henry and Sarah Ann Webber of Down St. Mary, nr. Bow. Born in Down St. Mary 27 January 1890. Died 31 May 1916 aged 25.

Canteen Assistant on HMS Princess Royal,  Arthur Edward Weller civilian employee of the Royal Navy. Husband of Annie Shakerly (formerly Wedller). Born in Wandsworth in the September Quarter of 1893. Died 31 May 1916 at the Battle of Jutland aged 22

M12259 Painter 2nd Class William George Weeks of the Royal Navy, HMS Defence. Son of Walter and Emma Weeks of 2 Hampton Cottages, Regent St., Plymouth. Born in Plymouth 20 December 1892. Died 31 May 1916 aged 23.

171321 Petty Officer Stoker Philip John West of the Royal Navy, HMS Indefatigable. Husband of Beatrice Harriet (née Styles). Born in Plymouth 14 August 1869. Died 31 May 1916 aged 46.

K24833 Stoker 1st Class Walter West of the Royal Navy, HMS Indefatigable. Son of Alfred and Harriet West (née Bartlett). Born in Exmouth 6 December 1892. Died 31 May 1916 aged 23.

Petty Officer Stoker William George Henry Westlake of the Royal Navy, HMS Defence. Son of William and Amelia Westlake of Devonport; husband of Rosalind of 82 Spring Rd., Ipswich. Born in Devonport 27 February 1887. Died 31 May 1916 aged 29.

Based on information supplied by a family member:

PLY15247 Corporal Albert Whiddon of the Royal Marine Light Infantry, HMS Defence. Son of Albert and Susan Whiddon of 2 Vallart Place, Plymouth (his father also served in the RMLI). Born in Plymouth in 1892. Died 31 May 1916 aged 24. His father also served in the RMLI.

Canteen Manager on HMS Princess Royal  Ernest William White, civilian employee of the Royal Navy. Husband of Mrs. S. White, 109 Fore St., Devonport. Died 31 May 1916 aged 30. 

162487 Petty Officer William White of the Royal Navy, HMS Defence. Son of Charles and Mary Ann White; husband of Florence (née Fowler). Born in Stoke Damerel 5 August 1876. Died 31 May 1916 aged 39.

346020 Shipwright Ethelbert Whitell of the Royal Navy, HMS Defence. Son of John and Eliza Whitell (née Boyce). Born in Plymouth 8 August 1888. Died 31 May 1916 aged 27.

J23895 Ordinary Seaman Frederick Willey of the Royal Navy, HMS Defence. Son of Charles and Madeleine Willey of Wellington Rd., Exeter. Born in Exeter  20 January 1898. Died 31 May 1916 aged 18.

K17984 Stoker 1st Class Harold Samuel J. Willcox of the Royal Navy, HMS Indefatigable. Son of Laura Jessie Willcox of 12 Richmond St., Plymouth. Born in Plymouth 28 January 1894. Died 31 May 1916 aged 22. 

223977 Able Seaman Frederick John Williams of the Royal Navy, HMS Lion. Son of Frederick and Elizabeth Williams; husband of Beatrice. Born in Devonport 7 October 1885. Died 31 May 1916 aged 30.

PLY15622 Private Sidney Joseph Williams of the Royal Marine Light Infantry, HMS Defence. Son of Josiah and Susan Williams of Exeter. Born in Exeter in the March Quarter of 1891. Died 31 May 1916 aged 25.

226634 Petty Officer Thomas E. Williams of the Royal Navy, HMS Indefatigable. Son of James and Jane Williams; husband of Lilian (née Wright). Born in Plymouth 9 November 1885. Died 31 May 1916 aged 30.

271710 Engine Room Artificer Samuel Sherwell Willing of the Royal Navy, HMS Indefatigable. Son of Samuel and Margaret Willing. Born in Plymstock in 1889. Died 31 May 1916 aged 27.

J5206 Leading Seaman William Henry Wills of the Royal Navy, HMS Defence. Son of Francis and Fanny Wills of 1 Tamar Rd., Devonport. Born in Laira, Plymouth, 10 September 1891. Died 31 May 1916 aged 25. 

290128 Leading Stoker Robert Henry Wilson of the Royal Navy, HMS Defence. Son of George and Jane Wilson of Tavistock. Born in Bridestowe 5 September 1882. Died 31 May 1916 aged 33.

193595 Petty Officer William Charles Wilson of the Royal Navy, HMS Indefatigable. Son of Charles and Priscilla Wilson of 3, Hoe Park Terrace, Plymouth. Born in Mawnan, Cornwall 17 December 1881. Died 31 May 1916 aged 34. 

173333 Armourer's Crewman Ernest Wise of the Royal Navy, HMS Indefatigable. Son of John and Jane Wise of Plymouth. Born in Plymouth 6 November 1871. Died 31 May 1916 aged 44. 

J37472 Boy 1st Class William Wolland of the Royal Navy, HMS Invincible. Son of Frederick and Blanche Wolland of Bideford. Born in Bideford 11 June 1898. Died 31 May 1916 aged 17. 

193330 Able Seaman Ernest Wood of the Royal Navy, HMS Defence. Son of James and Isabella Wood of Modbury; husband of Honor (née Perkins). Born in Modbury 15 December 1879. Died 31 May 1916 aged 39.

J/ 10565 Able Seaman Reginald John Wood of the Royal Navy, HMS Indefatigable. Nephew of Sarah Wood of Chillington, near Kingsbridge. Born in Torquay 28 August 1894. Died 31 May 1916 aged 22.

197087 Petty Officer William Thomas Woodrow of the Royal Navy, HMS Defence. Son of Samuel and Emily Woodrow (née Gibbs). The GRO gives his birth date in Torquay as the March Quarter of 1882 but William told the Navy he was born in 1880 when he enlisted. Died 31 May 1916 aged 34.

185466 Chief Petty Officer Herbert Woods of the Royal Navy, HMS Indefatigable. Son of James and Hannah Woods of Ermington; husband of Lizzie (née Jones). Born in Ivybridge 15 January1880. Died 31 May 1916 aged 36. 

177335 Chief Petty Officer Ernest James Woollacott of the Royal Navy, HMS Defence. Son of Thomas and Mary Jane Woollacott of 5 Westhill Terrace, Kingskerswell. Born in Kingskerswell 10 June 1876. Died 31 May 1916 aged 39.

K18390 Stoker 1st Class Abel Harry Woolridge of the Royal Navy, HMS Defence. Son of Caleb and Emma Jane Woolridge of Ley Cottages, Bere Ferrers. Born in Bere Ferrers 22 March 1894. Died 31 May 1916 aged 22.

K8491 Stoker 1st Class William Henry Worn o f the Royal Navy, HMS Indefatigable. Son of George and Mary Jane Worn of 31 Frankfort St., Plymouth. Born in Laira, Plymouth 16 May 1893. Died 31 May 1916 aged 23. 

J2708 Able Seaman James Henry Wyles of the Royal Navy, HMS Indefatigable. Son of John Wyles. Born in Plymouth 3 February 1893. Died 31 May 1916 aged 23.

211476 Able Seaman John Henry Yard of the Royal Navy, HMS Indefatigable. Son of William and Susan Yard; husband of Mabel Yard of Tavistock. Born in Tavistock 15 July 1881. Died 31 May 1916 aged 34.

K25883 Stoker 2nd Class John Gilbert Yearling of the Royal Navy, HMS Indefatigable. Son of John and Mary Ann Yearling (née Stidiver) of 23 Richmond St., Plymouth. Born in East Stonehouse 24 January 1899. Died 31 May 1916 aged 17. (Claimed to be older on enlistment.)

J4882 Leading Seaman John Henry Yeo of the Royal Navy, HMS Tiger. Son of Henry and Alice Yeo of Gappah, nr. Chudleigh. Born in Gappah 23 February 1894. Died 31 May 1916 aged 21.

K33340 Stoker 1st Class John Louis Yeo of the Royal Navy, HMS Defence. Son of John and Mabel Yeo of 26 Roseberry Ave., Exmouth. Born in Plymouth 10 January 1896. Died 31 May 1916 aged 20.

SS113049 Stoker 1st Class Stanley Joseph William Zanazzi of the Royal Navy, HMS Indefatigable. Believed to be a son of Joseph Zanazzi who also served in the Royal Navy. Born in Plymouth 4 November 1894. Died 31 May 1916 aged 21.