What does Advik mean?
A modern Sanskrit-derived name generally glossed as 'unique, one of a kind', linked to the idea of advitiya ('without a second, incomparable'). The further association with advaita ('non-duality') is thematic rather than a direct etymology.
What does Om mean?
From Sanskrit Om (ॐ), the sacred primordial sound and mantra regarded in Hindu tradition as the essence of the universe. Used as a name it carries that whole spiritual weight.