Irving Cummings's 4 syllables (2 + 2) hit the Hollywood sweet spot.
Irving's 2 beats vs. Cummings's 2 create a natural cinematic snap.
Irving Cummings's softer consonants cost it screen presence.
Irving Cummings misses the alliteration hook that makes names stick.
Irving (6 letters) and Cummings (8) are balanced in length — clean on any poster or marquee.
Irving Cummings has mostly familiar phonemes with a few tricky patterns.
Irving Cummings has decent vowel richness, but stronger A and O sounds would lift it.