The House of Komnenos (pl. Komnenoi; , pl. , ), latinized Comnenus (pl. Comneni), was a Byzantine Greek noble family who ruled the Byzantine Empire in the 11th and 12th centuries. The first reigning member, Isaac I Komnenos, ruled from 1057 to 1059. The family returned to power under Alexios I Komnenos in 1081 who established their rule for a period of 104 years until it ended under Andronikos I Komnenos in 1185. In the 13th century, they founded and ruled the Empire of Trebizond, a Byzantine rump state from 1204 to 1461. At that time, they were commonly referred to as Grand Komnenoi (, ), a style that was officially adopted and used by George Komnenos and his successors. Through intermarriages with other noble families, notably the Doukas, Angelos, and Palaiologos, the Komnenos name appears among most of the major noble houses of the late Byzantine world. Origins The 11th-century Byzantine historian Michael Psellos reported that the Komnenos family originated from the village of Komne in Thrace—usually identified with the "Fields of Komnene" () mentioned in the 14th century by John Kantakouzenos—a view commonly accepted by modern scholarship. The first known member of the family, Manuel Erotikos Komnenos, acquired extensive estates at Kastamon in Paphlagonia, which became the stronghold of the family in the 11th century. The family thereby quickly became associated with the powerful and prestigious military aristocracy () of Asia Minor, so that despite coming from Thrace it came to be considered "eastern". The 17th-century French scholar du Cange suggested that the family descended from a Roman noble family that followed Constantine the Great to Constantinople, but although such mythical genealogies were common—and are indeed attested for the closely related Doukas clan—the complete absence of any such assertion in the Byzantine sources argues against Du Cange's view. The Romanian historian George Murnu suggested in 1924 that the Komnenoi were of Aromanian descent, but this view too is now rejected. Modern scholars consider the family to have been entirely of Greek origin. Manuel Erotikos Komnenos was the father of Isaac I Komnenos (), and grandfather, through Isaac's younger brother John Komnenos, of Alexios I Komnenos (). Founding the dynasty Isaac I Komnenos, a stratopedarch of the East under Michael VI, founded the Komnenos dynasty of Byzantine emperors. In 1057 Isaac led a coup against Michael and was proclaimed emperor. Although his reign lasted only until 1059, when his