In Theogony by Hesiod, he is said to have a brother named Nausithous.
While stranded on Ogygia, Odysseus was forced to become the lover of Calypso.
[1] According to Hesiod, this union resulted in two sons, named Nausinous and Nausithous.
[2] Neither Nausinous nor his brother are mentioned in Homer's Odyssey.
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