Gertrude Selby's 4 syllables (2 + 2) hit the Hollywood sweet spot.
Gertrude's 2 beats vs. Selby's 2 create a natural cinematic snap.
Gertrude Selby's softer consonants cost it screen presence.
Gertrude Selby misses the alliteration hook that makes names stick.
Gertrude (8 letters) and Selby (5) have a slight length mismatch, but it reads fine on screen.
Gertrude Selby has mostly familiar phonemes with a few tricky patterns.
Gertrude Selby has decent vowel richness, but stronger A and O sounds would lift it.