the king of the south. Ptolemy Soter, son of Lagus, king of Egypt (see Dan_11:8). He took the title "king"; whereas his father "Lagus" had been only governor.
south. With reference to Judea.
one of his princes. Seleucus I (Nicator = conqueror).
him: i.e. Ptolemy.
a great dominion. It added Syria to Babylon and Media.