In Star Trek Beyond, Jaylah was an alien of an unnamed race that was stranded on Krall's planet. She assisted the crew of the U.S.S. Enterprise when they were attacked and stranded there as well. She was a resourceful engineer, and she taught herself English from a database. Simon Pegg stated in an interview that the character was inspired by Jennifer Lawrence's character in Winter's Bone, and that Jaylah was dervied from her nickname, 'J-Law'.
Jaylah is a variant of Jay, which means 'blue crested bird'. In 2015, Jaylah was the 483rd most popular name for girls in the U.S. The alternate spelling Jayla ranked at #238, and Jaylaa was given to 8 girls.