Ludwig Alexander Georg Graf von Hoyos, Freiherr zu Stichsenstein (13 May 1876 – 20 October 1937) was an Austro-Hungarian diplomat who played a major role during the July Crisis while serving as chef de cabinet of the Foreign Minister at the outbreak of World War I in 1914. He was the last chef de cabinet of Austria-Hungary. He was the grandson of Robert Whitehead, the inventor of the torpedo.
Hoyos was born in Fiume (then part of Austria-Hungary, now called Rijeka in Croatia) on 13 May 1876 into the House of Hoyos, a noble family that hailed originally from Spain, but which had migrated to Austria around 1525. Over the centuries, the family had become part of the Hungarian nobility.
His parents were Georg Anton, Count of Hoyos (1842–1904), and Alice Whitehead, who was the daughter of Robert Whitehead, the British engineer and inventor of the torpedo. They had married in 1869, and Georg Hoyos had been in charge of the Whitehead shipyard in Fiume at the time. One