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 Dev mean?
From Sanskrit deva (देव), 'god, deity, divine one', from a root meaning 'to shine'. A simple, ancient word meaning 'divine'.