Porus, the Greek form of the name of several kings of India, two of whom were met by Alexander in his conquest of the East. The first ruled E. of the Hydaspes, and when the Greeks attempted to cross that river he prepared to dispute its passage at the head of a large force and with more than 200 trained elephants. Alexander forded the stream higher up, and in the desperate battle that ensued prevailed by his superior generalship. Porus was forced to flee after seeing two of his sons slain and being himself severely wounded. Being captured, he was honorably treated, and became Alexander's ally, accompanying him in several expeditions. Alexander enlarged his dominions, so that they extended from the Hydaspes to the Hyphasis, and were said to include seven nations and more than 2,000 cities. He was treacherously put to death by Eudemus, who was left commander of the Greek troops in that region. It is said that he was five cubits in stature. - His cousin of the same name ruled at the same time over Gandaris, E. of the Hydraotes. He fled on the approach of Alexander, and his dominions were given to his kinsman, to whom he had previously been hostile.