Leopold Anton Johann Sigismund Josef Korsinus Ferdinand Graf Berchtold von und zu Ungarschitz, Frättling und Püllütz was an Austro-Hungarian politician, diplomat and statesman who served as Imperial Foreign Minister at the outbreak of World War I.

Alois Leopold Johann Baptist Graf Lexa von Aehrenthal was a diplomat from the Austro-Hungarian Empire. Biographer Solomon Wank says he exuded a strong monarchical-conservative outlook, loyalty to the Empire, and optimism regarding its ability to survive and flourish in the early 20th century. He is best known for promoting an energetic foreign policy in the Balkans, seeking cooperation with Russia and approval of Germany for actions that angered the South Slav element in the Balkans.