Cameahwait was a Shoshone chief and the brother of Sacagawea. He was the leader of the first group of inhabitants of modern-day Idaho who were encountered by Europeans when he met Meriwether Lewis and three other members of the Lewis and Clark Expedition on August 13, 1805.[1] He then accompanied Lewis across Lemhi Pass to meet William Clark and the remainder of the expedition. Sacagawea was with Clark's party and recognized Cameahwait as her brother.
To the Shoshone, Cameahwait and Sacagawea were brother and sister. However, in the Shoshoni language, "cousin" and "brother" are the same word, indicating the tribe thinks of them as the same. Consequently, when Sacagawea cried out that she recognized Cameahwait as her brother, that is what she meant, but whether they actually had the same father, let alone the same mother, is unclear.[2]