I'll echo what Steve wrote in his first post, if you found it on a site that produces other man made beads then maybe, but if it was just a creek/field find with flakes, then I'd say no it isn't a bead.
Beadman, Mantou is a delicious steamed bun from Northern China (I fell in love with them when I worked in Beijing.). Manitou is an Algonquin word/concept, I'm pretty sure it's specific to the area they occupied. The Cherokee, Souix, Seminole, Modok, and others, for example, had completely different pantheon/religious views at the time of contact.