Antiochus was a Seleucid prince, first-born child to the Seleucid monarchs Antiochus III the Great and Laodice III, and his father's first heir. Wikipedia
Born: 221 BC
Died: 194 BC (age 27 years)
Grandchildren: Mithridates V Euergetes and Nysa of Cappadocia
Children: Nysa
Great grandchildren: Mithridates VI Eupator, Ariarathes VI of Cappadocia, Laodice, and more
Great-grandparents: Antiochus II Theos, Laodice I, Achaeus, and more
Parents: Antiochus III the Great and Laodice III