The name Ganesha is a Sanskrit compound, joining the words gana (gaṇa), meaning a group, multitude, or categorical system and isha (īśa), meaning lord or master. The word gaṇa when associated with Ganesha is often taken to refer to the gaṇas, a troop of semi-divine beings that form part of the retinue of Shiva, Ganesha’s father. The term more generally means a category, class, community, association, or corporation. Some commentators interpret the name “Lord of the Gaṇas” to mean “Lord of Hosts” or “Lord of created categories”, such as the elements. Ganapati (गणपति; gaṇapati), a synonym for Ganesha, is a compound composed of gaṇa, meaning “group”, and pati, meaning “ruler” or “lord”. Though the earliest mention of the word Ganapati is found in hymn 2. 23. 1 of the 2nd-millennium BCE Rigveda, it is however uncertain that the Vedic term referred specifically to Ganesha. The Amarakosha, an early Sanskrit lexicon, lists eight synonyms of Ganesha: Vinayaka, Vighnarāja (equivalent to Vighnesha), Dvaimātura (one who has two mothers), Gaṇādhipa (equivalent to Ganapati and Ganesha), Ekadanta (one who has one tusk), Heramba, Lambodara (one who has a pot belly, or, literally, one who has a hanging belly), and Gajanana (gajānana); having the face of an elephant.