Wikipedia
Uttamatomakkin, known as Tomocomo for short, was a Powhatan holy man who accompanied Pocahontas (real name Matoaka, later given the name Rebecca Rolfe) when she was taken to London in 1616.
Little is known about Tomocomo's life before his visit to London. He appears to have met Captain John Smith during Smith's time in Virginia, since Smith says that in London they "renewed their acquaintance". His wife, Matachanna, was Pocahontas's half-sister.
Tomocomo must have been trusted by Chief Powhatan, as Powhatan requested him to accompany her in order to count the number of people in England. Arriving at Plymouth, Tomocomo picked up a stick on which to mark notches to keep a tally, but soon grew "weary of that task". Powhatan also asked him to discover whether Smith was still alive (the Powhatan natives had been told that Smith was dead, but, as Pocahontas told Smith "your countrymen will lie much").
Samuel Purchas, a compiler of travel narratives, met Tomocomo at the home of "my good friend Doctor Goldstone, where he was a frequent guest, and where I have both seen him sing and dance his diabolical measures, and heard him discourse of his country and religion." Purchas believed that the Powhatan people were devil-worshippers and tried to persuade Tomocomo to take up Christianity, but Tomocomo said he was too old to learn new ways.
Pocahontas and Tomocomo were never given a formal audience before King James. However, on January 5, 1617 they were brought before the King at the Banqueting House in Whitehall Palace, at a performance of Ben Jonson's masque The Vision of Delight. However, according to Smith, Tomocomo did not realize who they had met until it was explained to him afterward. Tomocomo was disappointed that the King did not offer a present, saying to Smith "You gave Powhatan a white dog, which Powhatan fed as himself, but your King gave me nothing, and I am better than your white dog."
When Tomocomo returned to Virginia with Samuel Argall and Rolfe in March 1617, he reportedly uttered diatribes "against England, English people" and against Thomas Dale, governor of Jamestown. The colonists rebutted his claims in front of the Powhatan leaders, and Tomocomo apparently was disgraced. However, Chief Powhatan died the next year, and his successor, Opechancanough, began planning a massive attack on the settlers. Nothing more is known of Tomocomo's life.