Personal Note: (FYI- There isn't any such thing as an Native American 'Princess'- Tribal culture doesn't work the same way as Feudal Monarchies, besides the fact that every woman in the tribe would then be a 'Princess'... Just plain stupid.)
Please provide the original source that suggests 'Mary' being 'Mary Hyanno'...
Mary (UNKNOWN) who Married to William Cornwall as his second wife, b. May 25, 1609 d. February 21, 1677/78 by 1639, probably in Hartford.
NOTE: The story that her identity is “Mary Hyanno,” a supposed Indian princess was started in the late 1990s with the publication of a CD-Rom of compiled genealogical information, Family Archive CD-100: 1500-1990 Family Pedigrees by United Ancestries, a now-defunct company. This identity is totally unsupported by any original sources despite diligent research by qualified genealogists. See The Middler, Newsletter of the Society of Middletown First Settlers Descendants, Vol 6 No.1, Spring 2006 by Editor R. W Bacon for an in depth discussion of this topic.
I think it best, to alleviate confusion that 'Mary Hyanno' be disconnected from William Cornwall, until proof and/or evidence can be provided.