Sacajawea married one of the men in the expedition, Charbonneau. The baby depicted in the coin is one of my
distant relatives, or possibly an
ancestor. She was integral to the
expedition because her interpreter's skills were the reason that Lewis & Clark were able to winter with Native Americans instead of freezing to death. It is debatable whether or not she actually married Charbonneau, or was simply taken by him by force.
Alternate spellings of her name were
considered for the release of the one dollar
coin (Sacagawea being the most argued variation) but the correct spelling is Sacajawea, and was kept for the coin.