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Family name Watsa (วรรษา , Watsa , วัสตร์ ) , around the globe, is a rare last name. The cognomen Watsa is habitual in Cameroon, where it is quite a rare surname, Thailand, where it is a very rare surname, and Canada. Measured by absolute frequency, it is the most numerous in Cameroon, India, and Thailand. Likewise, Watsa is the forename as well as the last name.