What Indian chief was at the First Thanksgiving?

Chief Massasoit, the leader of the Wamponoag village, attended the first Thanksgiving.

That Thanksgiving was also attended by Samoset, who was the sagamore (secondary chief) of the Abenaki tribe, and Squanto. Squanto, also known as Tisquantum, was a Patuxet Indian who had been adopted into Massasoit's tribe after his own had been wiped out. Squanto was not a chief. However, he did assist the Pilgrims even though at one point he had been captured by the British and held as a slave.