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Around the globe, Grethel (Grethel ) is quite a common principally feminine, but very seldom masculine given name. The given name Grethel is characteristic of Latin America and the Caribbean, particularly Nicaragua, where it is quite a common feminine name, Costa Rica, where it is quite a rare girly name, and Cuba, where it is quite a rare epicene name. Measured by absolute frequency, it is the most numerous in Nicaragua, Philippines, and Cuba. Much less frequently, Grethel is the last name as well as the forename.