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In all the world, Marylu (Marylu ) is quite a rare female forename. The first name Marylu is characteristic of Latin America and the Caribbean, particularly Nicaragua, where it is quite a rare female name, Guatemala, where it is a rare feminine name, and Peru. Measured by absolute frequency, it is commonest in Mexico, the United States, and Peru. Much less frequently, Marylu is the last name as well as the forename.