Kine of Araw

The Kine of Araw were legendary cattle-like creatures that lived around the fertile plains of the Sea of Rhun from the earliest days of Arda onward.

History
According to the Encyclopedia of Arda, the Kine of Araw were descended from the even greater kine (cattle) of Orome the Hunter, who was known to be the master of beasts and birds. As Orome was chosen to lead the Elves on the Great Journey, he might have intentionally (or accidentaly) left his livestock in the East.

They presumably lived in the areas immediately adjacent to the Sea of Helcar, relocating to their present location around the Sea of Rhun when that great ocean dried up.

Vorondil the Steward of Gondor ventured to the far East and hunted one such beast, utilizing its great horns to craft the exquisite Horn of Gondor. For the lengthy years afterward, it became a heirloom of Gondor's stewards, handing it down to their oldest son for innumerable generations.

However, its doom drew ever nearer, just as Sauron's shadow returned from the depths of the East. During the War of the Ring it was carried (and destroyed by) Boromir son of Denethor when he was assailed by hundreds of Uruk-hai. The Uruk scimitars and broadswords clove the great horn in two, rendering it useless. After being presented to his grieving (and insane) father, it was buried with him.

Description
According to Appendix A of the Lord of the Rings, the Kine of Araw were far larger and splendid than common, earthly cattle (like Old Bessie). Their hides were a gleaming pallid white that reflected the sun rising from the Gates of Morning in the East.

The horns attached to their gargantuan bodies were colossal in size, giving the kine an air of grandeur. While nobody knows what the kine really looked like, their size and scant description that we posess may give them an appearance similar to the real-life Texas Longhorn.

Etymology
Kine is a rather archaic English word meaning 'cattle'. As Tolkien was deeply fluent in Old English, Welsh, and Scottish, he would have used the term rather than a more modern one to better suit the medieval feel of the Lord of the Rings.

Likewise, Araw is the Sindarin form of Orome, which is a term from Quenya. The full term denotes and explains the beasts' heritage and history.

Even if the above etymology is incorrect, Araw could still be a geographical name or location for where the beasts live.