659 OM anantaaya namaH .
One who pervades everything, who is eternal, who is the soul of all, and who cannot be limited by space, time, location, etc.
vishhnu puraaNa 2.5.24 says: The Lord is ananta because all beings including gandharva, apsara, siddha, kinnera, sarpa and chaarana cannot find the end of the attributes of the Indestructible Being, the Lord, anantaa.
327 OM skandaaya namaH .
One who flows (skandana) as amtRa. Or one who drives everything as air.
560 OM aanandine namaH .
One whose nature is aananda (bliss).
Or one who is attended by all prosperity and therefore is ever blissful.