Sat-Okh (c. 1920 – 3 July 2003), also known as Stanisław Supłatowicz, was a soldier in the Polish Resistance during World War II.

There has been considerable controversy as to whether his accounts were a hoax, as his books reflect culture and customs not associated with the peoples of the Northwest Territories.

Stanisław Supłatowicz claimed to be born in Canada about 1922 as the son of a Polish mother, Stanislawa Okulska, and a Shawnee father.

Supłatowicz joined the Home Army in Poland, where he gained a nickname Kozak because of his bravery and fighting style based on making traps.

Critics and reviewers of his work have noted that many of his descriptions are of First Nations life and customs associated with an earlier time period and with peoples of other geographical locations.