Native American chief. He succeeded his uncle Canonicus as chief of the Narragansett tribe in 1636.

Miantonomo was friendly with the colonists of Massachusetts and Connecticut and helped them in the war against the Pequot tribe in 1637. He signed the tripartite treaty for perpetual peace between his tribe, the Connecticut colonists, and the Mohegan tribe in 1638, but violated it in a war against the Mohegan in 1643.

He was defeated and captured by Uncas, the Mohegan chief, and taken to Boston, where he was tried by a committee of clergymen. Sentenced to be executed by Uncas, he was killed where he had been defeated, near the present site of Norwich, Connecticut.

"Miantonomo," Microsoft® Encarta® Online Encyclopedia 2001 http://encarta.msn.com © 1997-2001 Microsoft Corporation. All rights reserved.