Reference: Seleucus
Hastings
1. Seleucus I, (Nikator), originally a cavalry officer of Alexander the Great, became satrap of Babylon on the death of the king. After some vicissitudes his position there was securely established in b.c. 312, from which date the Seleucid era was reckoned (1Ma 1:18). The battle of Ipsus, b.c. 301, made him master of Syria and great part of the East. He founded Antioch and its fortified port Seleucia (1Ma 11:8), and is said by Josephus (Ant. XII. iii. 1) to have conferred on the Jews the privileges of citizenship. He is the 'one of his [i.e. the king of Egypt's] princes' (Da 11:5). He died b.c. 280.
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Smith
Sele-u'cus,
the name of five kings of the Greek dominion of Syria who are hence called Seleucidae. Only one--the fourth --is mentioned in the Apocrypha.