The Indians believed that a knowledge of the real names of persons gave their enemies power to cast spells upon them, so they were frequently known by several names and endeavored to conceal their true ones. They also had a custom of changing the name upon great occasions. Pocahontas, signifying, it is said, "Bright Stream Between Two Hills," was the household name of Powhatan's "dearest daughter." She had also two other names, Amonate and Matoaka, the last being her "real name." Besides her favorite brother, Nantaquans, we know the names of two sisters, Matachanna and Cleopatre. The real name of Powhatan, it seems, was Wah-un-so-na-cook. This powerful Indian sagamore was at first attended by a bodyguard of forty or fifty tall warriors, which was increased to two hundred after hostilities commenced with the English. Captain Smith informs us that "every night upon the foure quarters of his house are four sentinels, each from other a slight shoot, and at every halfe houre one from the corps on guard doth hollow, shaking his lips with his finger betweene them, unto whom every sentinel doth answer round from his stand; if any faile, they presently send forth an officer that beateth him extremely." This is the first description we have of the Indian warwhoop still in vogue among certain tribes, and while it was a safeguard to prevent surprise, it must have tended to murder sleep about every half-hour during the watch of the night. We also read that Powhatan had a fleet, of which he was very proud. It consisted of a large number of the canoes called "dugouts," which are still in use among some tribes of Indians. These boats were made by a very laborious process. Trees of a kind of timber which would float readily were felled by fire and from the trunks a boat was shaped and hollowed out by means of burning and scraping with shells and tomahawks. The family of Powhatan was numerous and influential. Besides his sons and daughters there were also three brothers younger than himself; and upon them successively (and not his sons) according to their several ages, custom seems to have required that the government should devolve after his own death. The eldest, Opitchipan, accordingly succeeded him, in form at least. But this chief proved to be an inactive and unambitious man, owing in part to the fact that he was well advanced in years. He was soon thrown into the shade by the superior energy and greater talent of Ope-chan-ca-nough, who, before many years, ruled the entire federation acquired by Powhatan. Of the younger brother, Kekataugh, scarcely anything is known. He is thought to have died before an opportunity occurred to show his ability in a public station. It was Ope-chan-ca-nough, then sachem of the Pamunkies, who captured the indomitable Captain Smith while the latter was engaged in exploring the Chickahominy river.