Ethel Grey Terry's 5 syllables (2 + 3) hit the Hollywood sweet spot.
Ethel's 2 beats vs. Grey Terry's 3 create a natural cinematic snap.
Ethel Grey Terry's softer consonants cost it screen presence.
Ethel Grey Terry misses the alliteration hook that makes names stick.
Ethel (5 letters) and Grey Terry (9) have a slight length mismatch, but it reads fine on screen.
Ethel Grey Terry has mostly familiar phonemes with a few tricky patterns.
Ethel Grey Terry has decent vowel richness, but stronger A and O sounds would lift it.