Here is a figure from Roman History that really lived, but many only know of him from the Shakespeare play bearing his name. Remember the saying, "et tu, brute?" We often use this saying even today to express surprise at someone's position. I use it in a light hearted manner to jokingly accuse someone of betraying me. Like when a number of people gang up on me and are teasing me about something. Then one of my good friends joins in and I say to them "et tu, brute?" Seems like everyone knows what is meant by that saying.
Also, I believe we get the term Cesarian Section (C-Section) for child birth because he was born in this manner.
Julius I think is one of the more popular Cesars, but I am not sure why that is really? Maybe it is because he appealed to the poor and not the nobles thus making him a threat that led up to his assassination. Below is a probable picture of him:
Interesting fact: The first giraffe exhibited was in Rome in 46 B.C. by Julius Caesar. It was thought to have a camel for a mother and a leopard of a father. The ancient Romans called it a "camel-leopard".