Reginald Denny's 5 syllables (3 + 2) hit the Hollywood sweet spot.
Reginald's 3 beats vs. Denny's 2 create a natural cinematic snap.
Reginald Denny's softer consonants cost it screen presence.
Reginald Denny misses the alliteration hook that makes names stick.
Reginald (8 letters) and Denny (5) have a slight length mismatch, but it reads fine on screen.
Reginald Denny has mostly familiar phonemes with a few tricky patterns.
Reginald Denny has decent vowel richness, but stronger A and O sounds would lift it.