Phokas or Phocas (Greek: Φωκᾶς), feminine form Phokaina (Greek: Φώκαινα), was the name of a Byzantine aristocratic clan from Cappadocia, which in the 9th and 10th centuries provided a series of high-ranking generals and an emperor, Nikephoros II Phokas (r. 963–969). Its members and their clients monopolized the high command positions of the Byzantine army for much of the 10th century and led the successful Byzantine offensive against the Arabs in the East. As one of the leading families of the Anatolian military aristocracy, the Phokades were also involved in a series of rebellions that laid claim to power and challenged the emperors at Constantinople. Their power was eventually broken by Basil II (r. 976–1025), and the family declined in importance after the 11th century.
According to Michael Attaleiates, the family descended from the ancient Roman gens Fabia, while Ali ibn al-Athir ascribed them an Arab origin from Tarsos. Whatever their origins, the Phokades appear to have settled in Cappadocia, where their estates were concentrated and which is clearly attested as their power base and the center of their activities. Various authors have speculated on an Armenian or Georgian origin, partly to account for the frequent presence of the name "Bardas" among the family members, but none of these hypotheses can be conclusively proven.
The first attested member of the family was a soldier, probably of humble origin, who was appointed tourmarches in 872. His son, Nikephoros Phokas the Elder, became a distinguished general, scoring several victories against the Arabs, especially in southern Italy, and reaching the position of Domestic of the Schools. His son, Leo Phokas the Elder, was also Domestic of the Schools, but was defeated by the Bulgarian tsar Symeon (r. 893–927), and later unsuccessfully opposed the rise of Romanos Lekapenos to the throne in 919, being captured and blinded. His brother, Bardas Phokas the Elder, already active as a general, fell in disgrace for a time, but by the time of Lekapenos's fall in 944, he was a patrikios and a high-ranking general.