What are the names of wives of Ganapati?
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Ganga-Jamuna
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Gargi-Maitrayi
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Rambha-Menaka
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Riddhi-Siddhi
Lord Ganesha's wives are Riddhi (prosperity) and Siddhi (spiritual power). They represent the two forms of success. Ganga and Jamuna are rivers. Gargi and Maitrayi were Vedic philosophers. Rambha and Menaka were celestial dancers (apsaras).
In Hindu mythology, Ganesha (Ganapati) is traditionally depicted with two consorts, Riddhi and Siddhi, personifying prosperity/wealth and spiritual/material accomplishment respectively (in some traditions they are considered his daughters or attendants rather than wives, and regional variations exist, but the standard pairing taught in general trivia is as his wives). The other options are mismatched pairs from unrelated mythological or cultural contexts: Ganga-Jamuna refers to rivers, Gargi-Maitreyi are Vedic female philosophers/sages, and Rambha-Menaka are celestial apsaras — none associated with Ganesha's iconography. Riddhi-Siddhi is the standard, widely-taught answer for this question.