Wiktionary
n. (context Greek mythology English) a king of Thrace, the son of Boreas, who was vain and haughty and compared himself and his wife to Zeus and Hera
Wikipedia
In Greek mythology, King Haemus of Thrace (; , Haîmos) was the son of Boreas. He was vain and haughty and compared himself and his wife, Queen Rhodope, to Zeus and Hera. The gods changed him and his wife into mountains ( Haemus Mons and Rhodope Mountains, respectively). In ancient Greek, the Balkan Peninsula was thus known as the "Peninsula of Haemus" , a name which retains some currency in modern Greek.
Another classic etymology derives the name 'Haemos' from the myth about the fight of Zeus and the dragon Typhon:
:“He was again driven to Thrace and hurled entire mountains at Zeus in the battle around Mount Haemus. When these bounced back upon him under the force of the thunderbolt, blood gushed out on the mountain. From this, they say, the mountain is called haemus (“bloody”).”
Usage examples of "haemus".
A vast circle of Roman posts, distributed with skill, supported with firmness, and gradually closing towards a common centre, forced the barbarians into the most inaccessible parts of Mount Haemus, where they found a safe refuge, but a very scanty subsistence.
He questioned those who knew the country about the ascent of Haemus, and all agreed that was impossible for an army, and extremely difficult even for a small lightly equipped force.
From there he marched across the desolate country between Maedica and the Haemus, and in seven days reached the foot of the mountain range.
From the Caucasus to the Haemus Mountains-our route-the floor of Mare Serenitatis has hidden charms.