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Cognomen Sinjur (Senior , Sinjur ) , globally, is a common surname. The surname Sinjur is characteristic of Jamaica, where it is quite a common surname, Guernsey, and Curacao (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in the United Kingdom, the United States, and Ghana. Likewise, Sinjur is the forename as well as the last name.