Domentziolus (nephew of Phocas)

Domentziolus
Allegiance	East Roman Empire
Service/branch	East Roman army
Rank	magister militum per Orientem
Battles/wars	Byzantine-Sassanid War of 602–628
Relations	Emperor Phocas (uncle), Comentiolus (uncle), Domentziolus (?father/uncle)

Domentziolus (Greek: Δομεντζίολος) or Domnitziolus (Greek: Δομνιτζίολος) was a nephew of the Byzantine emperor Phocas (r. 602–610), appointed curopalates and general in the East during his uncle's reign. He was one of the senior Byzantine military leaders during the opening stages of the Byzantine–Sassanid War of 602–628. His defeats opened the way for the fall of Mesopotamia and Armenia and the invasion of Anatolia by the Persians. In 610, Phocas was overthrown by Heraclius, and Domentziolus was captured but escaped serious harm.

The exact parentage of Domentziolus is unclear: Phocas had two known brothers, Comentiolus and another also named Domentziolus, who has sometimes been suggested as the younger Domentziolus's father. Shortly after the accession of Phocas, in 603, the younger Domentziolus was raised to the titles of vir gloriosissimus, patricius and curopalates.

Domentziolus, however, is better known as a general in the Byzantine-Sassanid War of 602–628. Phocas's elevation to the throne had been recognized by neither the Sassanid Persian shah Khosrau II, nor by Narses, the Byzantine governor of the province of Mesopotamia. The two had allied against Phocas, with Narses gathering his forces in Edessa, while waiting for Sassanid reinforcements. In 604, Phocas appointed Domentziolus as magister militum per Orientem and sent him against the Persians. His predecessors Germanus and Leontius had both been defeated, the former killed in battle and the latter recalled and imprisoned by Phocas.

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