Andreus was the son of the river-god Peneus

Peneus

In Greek mythology, Peneus was a Thessalian river god, one of the three thousand Rivers , a child of Oceanus and Tethys. The nymph Creusa bore him one son, Hypseus, who was King of the Lapiths, and three daughters, Menippe , Daphne, and Stilbe. He also had a son Atrax with Bura, and Andreus with...

 in Thessaly

Thessaly

Thessaly is a traditional geographical region and an administrative region of Greece, comprising most of the ancient region of the same name. Before the Greek Dark Ages, Thessaly was known as Aeolia, and appears thus in Homer's Odyssey....

, from whom the district about Orchomenos in Boeotia

Boeotia

Boeotia, also spelled Beotia and Bœotia , is one of the regional units of Greece. It is part of the region of Central Greece. It was also a region of ancient Greece. Its capital is Livadeia, the second largest city being Thebes.-Geography:...

 was called Andreis. In another passage Pausanias

Pausanias (geographer)

Pausanias was a Greek traveler and geographer of the 2nd century AD, who lived in the times of Hadrian, Antoninus Pius and Marcus Aurelius. He is famous for his Description of Greece , a lengthy work that describes ancient Greece from firsthand observations, and is a crucial link between classical...

 speaks of Andreus (it is, however, uncertain whether he means the same man as the former) as the person who first colonized the island of Andros

Andros

Andros, or Andro is the northernmost island of the Greek Cyclades archipelago, approximately south east of Euboea, and about north of Tinos. It is nearly long, and its greatest breadth is . Its surface is for the most part mountainous, with many fruitful and well-watered valleys. The area is...

. According to Diodorus Siculus

Diodorus Siculus

Diodorus Siculus was a Greek historian who flourished between 60 and 30 BC. According to Diodorus' own work, he was born at Agyrium in Sicily . With one exception, antiquity affords no further information about Diodorus' life and doings beyond what is to be found in his own work, Bibliotheca...

, Andreus was one of the generals of Rhadamanthys, from whom he received the island afterwards called Andros as a present. Stephanus of Byzantium

Stephanus of Byzantium

Stephen of Byzantium, also known as Stephanus Byzantinus , was the author of an important geographical dictionary entitled Ethnica...

, Conon

Conon

Conon was an Athenian general at the end of the Peloponnesian War, who presided over the crucial Athenian naval defeat at Battle of Aegospotami; later he contributed significantly to the restoration of the political and military power.-Defeat at Aegospotami:Conon had been sent out following the...

 and Ovid

Ovid

Publius Ovidius Naso , known as Ovid in the English-speaking world, was a Roman poet who is best known as the author of the three major collections of erotic poetry: Heroides, Amores, and Ars Amatoria...

 call this first colonizer Andrus (son of Anius

Anius

In Greek mythology, Anius was a king of Delos and priest of Apollo. He was the son of Apollo and Rhoeo, daughter of Staphylus and Chrysothemis....

) and not Andreus. With Evippe

Evippe

Evippe may refer to:* Evippe, any one of six women in Greek mythology.**Evippe, one of the Danaids**Evippe, another Danaid** Evippe, daughter of Chiron**Evippe, mother of the Pierides**Evippe, daughter of Tyrimmas, who bore Odysseus a son, Euryalus...

, daughter of Leucon, Andreus had a son Eteocles

Eteocles (son of Andreus)

In Greek mythology, Eteocles was a king of Orchomenus. The local tradition concerning him is preserved in Pausanias' Description of Greece, and runs as follows....

, his successor.

Andreus is generally depicted riding a Yak, and is sometimes reputed to collect women in his sack, which he carries over his shoulder.