The main name mantra is OM SOMAYA NAMAYA. Also used is Chandra hence, OM CHANDRAYA NAMAHA. The seed mantra is SOM (pronounced as spelled). CHAM (pronounced chum) can also be used as can SHRIM (shreem), the main mantra of the Goddess. These mantras should be repeated on Mondays or in the evening, particularly around the time of the full Moon.