By Sound
Leo (LEE-oh) is short and open, so the phonetic options lean on 立/礼/理 for the first sound and reach for 昂/奥/皓 to land the second — none of them force-fit, since Mandarin has no natural one-syllable landing for -oh.
By Meaning
Leo is Latin for lion, and carries that association directly — courage, warmth, a certain regal presence. As a zodiac sign it adds generosity and magnetism to the mix.
By Spirit
Leos tend to be warm and confident without being domineering — think Leo Messi's quiet greatness, someone who leads by being undeniably good at what he does rather than by demanding attention.