4 In princely pomp, of all the world obeyed;
of > by
5 There also was that mighty monarch laid
monarch > (Alexander the Great, 356-323 BC, king of Macedon; conquered Thebes, Persia, Syria, Phoenicia, Egypt)
6 Low under all, yet above all in pride, 7 That name of native sire did foul upbraid,
native sire > [his] natural father upbraid > censure
8 And would as Ammon's son be magnified,
Ammon > (An Egyptian divinity to whom was dedicated a celebrated temple and oracle at Ammonium (Siwah), in Libya, which was visited by Alexander. Ammon was identified by the Romans with Jupiter)
9 Till, scorned of God and man, a shameful death he died.
of > by