Yul Brynner's 3 syllables (1 + 2) hit the Hollywood sweet spot.
Yul's 1 beat vs. Brynner's 2 create a natural cinematic snap.
Yul Brynner's softer consonants cost it screen presence.
Yul Brynner misses the alliteration hook that makes names stick.
Yul (3 letters) and Brynner (7) have a slight length mismatch, but it reads fine on screen.
Yul Brynner has mostly familiar phonemes with a few tricky patterns.
Yul Brynner has decent vowel richness, but stronger A and O sounds would lift it.