Who is Cameahwait from Sacajawea and what is their importance?

Cameahwait was Sacajawea's brother. Lewis is the first to meet Cameahwait because he is scouting ahead for the expedition. When the siblings finally meet, they are overjoyed. Cameahwait is the only member of Sacajawea's immediate family still surviving at the time of their reunion.