Leone dalle Carceri
Leone dalle Carceri (last attested 1259) was a Lombard baron of Negroponte and kinsman of Carintana dalle Carceri, the northern triarch of Oreos. When Carintana died childless in 1255 and the other two triarchs shut his family out, Leone appealed to William II of Villehardouin, the island's overlord.
William imprisoned the two triarchs and occupied Oreos, opening the War of the Euboeote Succession. Leone's son Grapella was recognized as triarch in the peace of 1262.