Sulpicius Alexander was a Roman

Roman Empire

The Roman Empire was the post-Republican period of the ancient Roman civilization, characterised by an autocratic form of government and large territorial holdings in Europe and around the Mediterranean....

 historian

Historian

A historian is a person who studies and writes about the past and is regarded as an authority on it. Historians are concerned with the continuous, methodical narrative and research of past events as relating to the human race; as well as the study of all history in time. If the individual is...

 of Germanic tribes. His work is lost, but his Historia in at least four books is quoted by Gregory of Tours

Gregory of Tours

Saint Gregory of Tours was a Gallo-Roman historian and Bishop of Tours, which made him a leading prelate of Gaul. He was born Georgius Florentius, later adding the name Gregorius in honour of his maternal great-grandfather...

. It was perhaps a continuation of the Res gestae by Ammianus Marcellinus

Ammianus Marcellinus

Ammianus Marcellinus was a fourth-century Roman historian. He wrote the penultimate major historical account surviving from Antiquity...

 (which ended in 378 AD) and dealt with events at least until the death of Valentinian II

Valentinian II

Flavius Valentinianus , commonly known as Valentinian II, was Roman Emperor from 375 to 392.-Early Life and Accession :...

 (392 AD). The work of Sulpicius Alexander as extracts in Gregory's Decem Libri Historiarum (II 9) is considered an important source in any discussion of the origin of the Frankish

Franks

The Franks were a confederation of Germanic tribes first attested in the third century AD as living north and east of the Lower Rhine River. From the third to fifth centuries some Franks raided Roman territory while other Franks joined the Roman troops in Gaul. Only the Salian Franks formed a...

tribes.