Fritigern or Fritigernus (died ca. 380) was a Tervingian Gothic

Goths

The Goths were an East Germanic tribe of Scandinavian origin whose two branches, the Visigoths and the Ostrogoths, played an important role in the fall of the Roman Empire and the emergence of Medieval Europe....

 chieftain whose decisive victory at Adrinaople

Battle of Adrianople

The Battle of Adrianople , sometimes known as the Battle of Hadrianopolis, was fought between a Roman army led by the Roman Emperor Valens and Gothic rebels led by Fritigern...

 the Gothic War (376-382) extracted favourable terms for the Goths when peace was made with Gratian

Gratian

Gratian was Roman Emperor from 375 to 383.The eldest son of Valentinian I, during his youth Gratian accompanied his father on several campaigns along the Rhine and Danube frontiers. Upon the death of Valentinian in 375, Gratian's brother Valentinian II was declared emperor by his father's soldiers...

 in 382.
Socrates Scholasticus

Socrates Scholasticus

Socrates of Constantinople, also known as Socrates Scholasticus, not to be confused with the Greek philosopher Socrates, was a Greek Christian church historian, a contemporary of Sozomen and Theodoret, who used his work; he was born at Constantinople c. 380: the date of his death is unknown...

, Sozomen

Sozomen

Salminius Hermias Sozomenus was a historian of the Christian church.-Family and Home:He was born around 400 in Bethelia, a small town near Gaza, into a wealthy Christian family of Palestine....

, and Zosimus

Zosimus

Zosimus was a Byzantine historian, who lived in Constantinople during the reign of the Byzantine Emperor Anastasius I . According to Photius, he was a comes, and held the office of "advocate" of the imperial treasury.- Historia Nova :...

 refer to conflicts between Fritigern and Athanaric

Athanaric

Athanaric was king of several branches of the Thervingian Goths for at least two decades in the fourth century. His name, Athanareiks, means "Year King" or "King for the Year" comes from the Gothic word Athni meaning "year" and the Gothic Reiks meaning "king."A probable rival of Fritigern, another...

. Ammianus Marcellinus

Ammianus Marcellinus

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

 and Philostorgius

Philostorgius

Philostorgius was an Anomoean Church historian of the 4th and 5th centuries. Anomoeanism questioned the Trinitarian account of the relationship between God the Father and Christ and was considered a heresy by the Orthodox Church, which adopted the term "homoousia" in the Nicene Creed. Very little...

 do not record such conflicts.

According to Socrates, Fritigern and Athanaric were rival leaders of the (Therving) Goths.