List of Famous people named William

Field Marshal Sir William Robert Robertson, 1st Baronet, was a British Army officer who served as Chief of the Imperial General Staff (CIGS) – the professional head of the British Army – from 1916 to 1918 during the First World War. As CIGS he was committed to a Western Front strategy focusing on Germany and was against what he saw as peripheral operations on other fronts. While CIGS, Robertson had increasingly poor relations with David Lloyd George, Secretary of State for War and then Prime Minister, and threatened resignation at Lloyd George's attempt to subordinate the British forces to the French Commander-in-Chief, Robert Nivelle. In 1917 Robertson supported the continuation of the Third Battle of Ypres, at odds with Lloyd George's view that Britain's war effort ought to be focused on the other theatres until the arrival of sufficient US troops on the Western Front.

William de Beauchamp, 9th Earl of Warwick was the eldest of eight children of William de Beauchamp of Elmley and his wife Isabel de Mauduit. He was an English nobleman and soldier, described as a “vigorous and innovative military commander." He was active in the field against the Welsh for many years, and at the end of his life campaigned against the Scots.

William George Howard, 8th Earl of Carlisle was an English clergyman and peer.

Lieutenant-General William Kerr, 2nd Marquess of Lothian, was a Scottish peer who held a number of minor military and political offices. He was known by the courtesy title of Lord Newbattle until 1692, when he succeeded as Lord Jedburgh, then as Marquess of Lothian when his father died in 1703.