Google takes on Wikipedia.

Bucephalus

Bucephalus was Alexander the Great's horse and as legendary as his master.

The name Bucephalus means 'ox-head' and he died of battle wounds in 326B.C in Alexander's last battle. Alexander founded the city of Bucephala (The modern town of Jhelum, Pakistan) in memory of the most famous stallion of ancient times.

Bucephalus was black with a white star on his forehead. He had one blue eye, a characteristic found in certain dog breeds such as the Harlequin Great Dane ( Deutsche Dogge).

Alexander had trained the stallion by keeping him facing the sun since Bucephalus was scared of his own shadow.

About Rumi: ( Mevlana Jalaluddin Rumi)

Rumi refers to his place of origin or birth, meaning from Rum (from Rome).

Ottomans referred to the Eastern Roman Empire as Rum. Rumi was born in Balkh (Afghanistan) and is often called Balkhi. Rumi has become more widely used than Balkhi.

Rumi's original name was Muhammad, he was given the title Jalal ( glory, splendor) al-Din (of the religion) meaning  the great of religion, later he was also named Mevlana meaning lord, master.

Rumi

Though every way I try
   His whim to satisfy,
     His every answering word
       Is a pointed sword.

See how the blood drips
   From His finger-tips;
     Why does He find it good
       To wash in my blood?

-  Mevlana Jallaluddin Rumi

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