American Folklore 

A real man with a mythical story, Johnny Appleseed was an American wanderer and gardener who introduced trees grown with apple seeds to large parts of Pennsylvania, Ohio, Indiana, Illinois, and Ontario, as well as the northern counties of West Virginia

A legendary strong man who won the battle of man vs. machine

The bravest woman on the battlefield, who never was

The Wendigo is a mythological, cannibalistic monster or evil spirit that originated in the folklore of Algonquian-speaking tribes in North America.

In Native American lore, particularly within Navajo culture, a "skin walker" is a malevolent witch who possesses the ability to transform into an animal, often using their powers for evil acts. 

The Thunderbird is a mythological bird-like spirit in North American indigenous peoples' history and culture. It is considered a supernatural being of power and strength.

An encyclopedia of folklore, mythology and religion

Monster Wiki is a catalog of monsters from all types of settings including novels, film, TV, games and video games.

A little information about a lot of topics 

A collection of United States and Native American Folklore curated by author S.E. Schlosser

An overview of Native American Mythology from the Touro University Library 

A listicle to introduce to you several characters in American Folklore