Daniel 8:21

21 And the young he-goat, the hairy one, [is] the king of Javan; and the great horn that [is] between its eyes is the first king;

Daniel 8:21 Meaning and Commentary

Daniel 8:21

And the rough goat is the king of Grecia
Including all the kings of it, from Alexander to the end of the Grecian monarchy; or rather the kingdom of Greece, which began in him, and continued until it was destroyed by the Romans: this was signified by the rough or hairy goat, especially when Alexander was at the head of it, for his strength and prowess, his swiftness in his marches over rocks and mountains, his majesty and grandeur, and also his lust and uncleanness; (See Gill on Daniel 8:5): and the great host that is between his eyes is the first king;
this is Alexander, who, though he was not the first king of Macedon, his father Philip, and others, were kings before him; yet was the first king of the Grecian monarchy, which took place on the Persian monarchy being destroyed by him.

Daniel 8:21 In-Context

19 and saith: Lo, I -- I am causing thee to know that which is in the latter end of the indignation; for, at the appointed time [is] the end.
20 `The ram that thou hast seen possessing two horns, [are] the kings of Media and Persia.
21 And the young he-goat, the hairy one, [is] the king of Javan; and the great horn that [is] between its eyes is the first king;
22 and that being broken, stand up do four in its place, four kingdoms from the nation do stand up, and not in its power.
23 `And in the latter end of their kingdom, about the perfecting of the transgressors, stand up doth a king, fierce of face, and understanding hidden things;
Young's Literal Translation is in the public domain.