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Across the world, Sylvanus (Sylvanus , Sylvan ) is a common mostly male, but infrequently female first name. The forename Sylvanus is habitual in Sub-Saharan Africa, particularly Nigeria, where it is quite a rare largely boy's, but uncommonly girly name, Cameroon, where it is quite a rare male name, and Tanzania. Measured by absolute frequency, it is commonest in Nigeria, Tanzania, and the United States. Also, Sylvanus is the last name as well as the forename.