Sacagawea
"An adoption document made in the Orphans Court Records in St. Louis, Missouri states, 'On August 11, 1813, William Clark became the guardian of 'Tousant Charbonneau, a boy about ten years, and Lizette Charbonneau, a girl about one year old.' For a Missouri State Court at the time, to designate a child as orphaned and to allow an adoption, both parents had to be confirmed dead in court papers."