Brigadier-General Sir William Algernon Ireland Kay, 6th Baronet, CMG, DSO (21 March 1876 – 4 October 1918) was a British Army officer.

During the First World War he deployed to the France in August 1914 as a part of the staff of the Commander of the British Expeditionary Force, Field Marshal Sir John French.

He was awarded one of the First Distinguished Service Orders of the First World War for conducting a 'reconnaissance of Great Value on 1 October, reaching a point within 100 yards of the enemy's outposts'.

[2] He was wounded in October 1914 and returned to France in Spring 1915 on the Staff of 24th Division, serving at the Battle of Loos.

[1] Brigadier General Kay and Captain Somervail are buried alongside each other at Vadencourt British Cemetery, Maissemy.