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Around the globe, Greni (Greni , Grendel ) is a rare gender-neutral given name. The forename Greni is characteristic of the Democratic Republic of the Congo, where it is a rare boy's name, Philippines, where it is a rare unisex name, and Peru, where it is a very rare female name. Measured by absolute frequency, it is commonest in the Democratic Republic of the Congo, Philippines, and Indonesia. Likewise, Greni is the last name as well as the forename.
Greni is also a name for the fictitious and mythical characters: Grendel , the fictional character in the poem Beowulf.