QQQ2
Quaint was my very faint clue. Each name - ADA LOVELACE, LADY DI, LEE IACOCCA, VLADE DIVAC and MALCOLM X - owns Roman numerals as its only consonants.
ADA LOVELACE, as seen here http://en.wikipedia.org/wiki/Ada_Lovelace
on Wiki, has a special place in both computing and puzzling. Only true verbal tragics will relish the fact that all-Roman ADA worked alongside the inventor of the first computer, Charles BABBAGE - the longest surname you can make using only musical notes….
But getting back to the Roman theme - what other names can you add to the list? Playwright DAVID MAMET goes close, with only the T sinking his ship.
To help you dream up a few more candidates, I’ll give you this Romanesque puzzle to tackle in the meantime:
Adding Roman numerals to the cluster TRE will give you English lyricist, TIM RICE. In the same vein can you find an Australian actor in RAGAHAN? Or two classical English actresses in OAEHAAN and ENEGH? (The letters provided keep their order.)