Think about his name.
He's the boss. You know right away. End of discussion.
Jack Be Nimble
Jack of All Trades
Jack the Ripper
And the list goes on.
Jack is his first name. Who he is. His essence.
With a wide range of Jacks, think of all the variations and layers that can be added to a character by using a simple name with a built-in history of sorts.
A small bird with a melodic song.
Captain Jack Sparrow was but one man on a huge sea.
Yet his voice, his words, captivated all he met . . . one way or another.
I've read that Johnny Depp based his characterization of Sparrow on Keith Richards. After I read that, I could see how his translation of the character played out. He did a great job.
As writers, we don't have a Johnny Depp to interpret the characters who populate our stories. It's our job to make our characters feel just as much alive for our readers as Depp's portrayal of Sparrow felt to viewers. How readers view a character can begin with a single name.
Next time you name a character, remember Captain Jack Sparrow.
And choose your name wisely.