Leo Diogenes

Leo Diogenes (Greek: Λέων Διογένης, romanized: Leōn Diogenēs; c. 1069 – 14 August 1087), styled as porphyrogenitus, was the son of Byzantine Emperor Romanos IV Diogenes and Eudokia Makrembolitissa. Likely crowned co-emperor together with his elder brother during his father's reign in 1070, he later served in the armies of Emperor Alexios I Komnenos. He does not appear on any of Romanos' coins, although there is at least one letter that refers to him as emperor (basileus). Anna Komnene notes that he and his brother Nikephoros both wore the diadem and tzangion (red sandals) usually reserved to emperors.