What does Rohan mean?
From Sanskrit rohana (रोहण), 'rising, ascending, growing'. Some sources also give 'sandalwood'; the core attested sense is 'ascending/growth'. (Note: an unrelated Irish name Rohan/Rowan also exists.)
What does Aarav mean?
From Sanskrit arava (आरव), literally 'a sound, roar, or shout'. Although hugely popular today and widely marketed as meaning 'peaceful' or 'calm', that gloss is a modern reinterpretation not supported by the root; the attested classical sense is 'noise/sound', sometimes softened to 'melody'.