Nicaea was wife of Alexander, tyrant of Corinth

Corinth

Corinth is a city and former municipality in Corinthia, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality Corinth, of which it is the seat and a municipal unit...

 during the reign of Antigonus Gonatas. After the death of her husband, who was thought to have been poisoned by the command of Gonatas, Nicaea retained possession of the important fortress of Corinth: but Antigonus lulled her into security by offering her the hand of his son Demetrius

Demetrius II of Macedon

Demetrius II Aetolicus son of Antigonus Gonatas and Phila, reigned as king of Macedonia from the winter of 239 to 229 BC. He belonged to the Antigonid dynasty and was born in 275 BC. There is a possibility that his father had already elevated to him to position of power equal to his own before his...

 in marriage, and took the opportunity during the nuptial festivities to surprise the citadel. She is probably the same person mentioned by Sudas

Sudas

Sudās was a king in the Rig Veda. His name means "worshipping well", an s-stem, either from a root dās, or with the extra s added to avoid an archaic root noun in ā, Sudā-, which would easily be mistaken for a feminine name....

 (s.v. Euphorion) as patronising the poet Euphorion of Chalcis

Euphorion of Chalcis

Euphorion, Greek poet and grammarian, born at Chalcis in Euboea about 275 BC.Euphorion spent much of his life in Athens, where he amassed great wealth. After studying philosophy with Lacydes and Prytanis, he became the student and eromenos of the poet Archeboulus. About 221 he was invited by...

 , though that author calls her husband ruler of Euboea

Euboea

Euboea is the second largest Greek island in area and population, after Crete. The narrow Euripus Strait separates it from Boeotia in mainland Greece. In general outline it is a long and narrow, seahorse-shaped island; it is about long, and varies in breadth from to...

, instead of Corinth.