Seleucus in Harpers Dictionary of Classical Antiquities (1898)

Eldest son of Demetrius II., assumed the royal diadem on learning the death of his father, 125; but his mother, Cleopatra , who had herself put Demetrius to death, was indignant at hearing that her son had ventured to take such a step without her authority, and caused Seleucus also to be assassinated.

Read More about Seleucus in Harpers Dictionary of Classical Antiquities (1898)