The original Sasquatch is Walter Langkowski:
|Sasquatch (Walter Langkowski) - member of Omega Flight, former member of Alpha Flight, only survivor of Alpha Flight after its confortation with the Collective|
There are multiple individuals who have used this name in the Marvel Universe.
Sasquatch (race) - race of giant, hairy humanoids living in Canada
There are multiple individuals who have acted as imposters using this name.