Cleopatra was a contemporary of Julius Caesar, and played a major role in his biography. (Which is why Plutarch wrote about her, which is why Shakespeare wrote about her, which is why 20th Century Fox made the film about her.) Julius Caesar is... a big name... in the West. Call that "the effect of media" if you like, but it's a thing.

Hatshepsut and Nefertiti lived respectively 1400 and 1300 years before Cleopatra, and about 700 years before even the founding of Rome. I'm no expert, but seems to me that those two names completely disappeared from the historical record between say 1000 BC and AD 1800, and were rescued from obscurity only by 19th-century archaeologists.