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.