What is the name of the rabbit in 'The Tale of Peter Rabbit'?

The rabbit in 'The Tale of Peter Rabbit' is Peter Rabbit.

Beatrix Potter created Peter as the mischievous eldest of four young rabbits. He disobeys his mother, Mrs. Rabbit, by entering Mr. McGregor's garden, where he eats vegetables, loses his blue jacket and shoes, and narrowly escapes capture. His sisters are Flopsy, Mopsy and Cotton-tail, while Benjamin Bunny is his cousin, not his brother.

Potter first developed the story in 1893 as an illustrated letter for Noel Moore, the five-year-old son of her former governess. Peter's name was inspired by Potter's pet rabbit, Peter Piper. She privately printed the tale in 1901, and Frederick Warne published a commercial edition in 1902.

A common mix-up is treating Benjamin Bunny or one of Peter's sisters as the title character. The story's full title identifies the answer directly: Peter is the rabbit whose adventure drives the book.