What does Ari mean?
From Hebrew ari (also aryeh), 'lion.' A short modern Hebrew name; distinct from the theophoric Ariel ('lion of God'). A concrete noun — its strength associations are connotation, not etymology.
What does Uriel mean?
Hebrew name combining 'ur' ('light, flame') with 'el' ('God'), usually translated 'God is my light' or 'flame of God'. Uriel is an archangel traditionally linked with fire; the element 'ur' carries both 'light' and 'flame' senses, so the fire reading is one of two.