Jack Lemmon's 3 syllables (1 + 2) hit the Hollywood sweet spot.
Jack's 1 beat vs. Lemmon's 2 create a natural cinematic snap.
Jack Lemmon's softer consonants cost it screen presence.
Jack Lemmon misses the alliteration hook that makes names stick.
Jack (4 letters) and Lemmon (6) are balanced in length — clean on any poster or marquee.
Jack Lemmon has mostly familiar phonemes with a few tricky patterns.
Jack Lemmon's open vowels roll off the tongue — warm and screen-ready.