I know your coworker was probably exaggerating for the point of the joke but Lashawn isn't even that bad. It's when people slam together parts of three different names to make some four syllable albatross of a name that your resume gets trashed by default.

There's also white people names that will get your resume trashed for implying low class but they tend to lack the aural flare that stereo-typically low class black people names have.