The name Caitlin is most commonly used in English-speaking countries such as the United States, the United Kingdom, and Canada. It was more popular in the 1990s and early 2000s, but has since declined in popularity.

The name Caitlin has been used by several notable figures throughout history, including Caitlin Thomas, the wife of the Welsh poet Dylan Thomas. She was also a writer and published several books, including a memoir about her life with Dylan called "Leftover Life to Kill."

Caitlin Jenner (formerly known as Bruce Jenner) is a former Olympic athlete and reality television personality. She won the gold medal in the decathlon at the 1976 Summer Olympics and later became a television personality, appearing on the reality show "Keeping Up with the Kardashians" and starring in her own reality show, "I Am Cait."