Wikipedia
In 4th century Christianity, the Anomoeans, also spelled "Anomeans" and known also as Heterousians, Aëtians, or Eunomians, were a sect that upheld an extreme form of Arianism, which denied not only that Jesus Christ was of the same nature ( consubstantial) as God the Father but also that he was of like nature ( homoiousian), as maintained by the semi-Arians.
The word "anomoean" comes from Greek 'not' and 'similar': "different; dissimilar". In the 4th century, during the reign of Constantius II, this was the name by which the followers of Aëtius and Eunomius were distinguished as a theological party.
The semi-Arians condemned the Anomoeans in the Council of Seleucia, and the Anomoeans condemned the semi-Arians in their turn in the Councils of Constantinople and Antioch; erasing the word from the formula of Rimini and that of Constantinople and protesting that the Word had not only a different substance but also a will different from that of the Father. From that, they were to be called .
In the 5th century, the Anomoean presbyter Philostorgius wrote an Anomoean Church history.