A female spirit who produced the earth and human beings at Onulap's command. She has the form of an eel, at whose breast the earth rest. Her stirrings cause the earth to tremble. Nigoubub is worshiped by those who desire children or those in labor.
- Bollig, Laurentius. (1927). The Inhabitants of the Truk Islands: Religion, Life, and a Short Grammar of a Micronesian People. Münster in Westphalia: Aschendorffsche Verlagsbuchhandlung, p. 12.