|Date of death:||1812|
|Children:||Amelia Black (daughter)|
|Voiced by:||Philip Anthony-Rodriguez|
|Games:||Seen: III, III: The WarChiefs|
|First game:||Age of Empires III|
|Last game:||Age of Empires III: The WarChiefs|
""He was a patriot, a good father and one of the best man my family ever produced....""—Amelia Black, talking about her father.
"Raised by his Iroquois mother Nonahkee and uncle Kanyenke, Nathaniel helped unite several Iroquois villages into a confederation of shared interests and economy. But the rising conflict between the American colonists and the British forces him, and other Iroquois, to choose sides. As the continent descends into war, under whose banner will Nathaniel's wits and courage be tested?"
While he is first seen in cameo at the end of Act II: Ice in the Age of Empires III campaign as a baby, Nathaniel is first seen as an adult trying to make peace among Iroquois when the American colonies and the British descend into war, forcing various Iroquois to choose sides. However, his plans are disrupted when the Hessian officer Colonel Sven Kuechler kidnaps his mother.
After rescuing Nonahkee, Nathaniel fights alongside the colonists in the American Revolution, becoming good friends with George Washington. As the war progresses, Nathaniel and Washington fight together in many battles, and Washington helps Nathaniel chase and defeat Kuechler. In return, Nathaniel decides to keep fighting alongside Washington until the war ends at the climactic Battle of Yorktown, which results in American victory.
With Independence won, Nathaniel returns to his village as a poor man having spent all his fortune on clothes and food for his men. He dies in 1812, and a statue is erected depicting him in the final cutscene of the act. Then, Chayton Black is seen paying homage to his grandfather, setting up the plot for Act II: Shadow.
- Nathaniel is the second hero in Age of Empires III that has two different versions: an Iroquois Nathaniel and a European-looking version. He has different unit responses for each version. The first was Kanyenke.