Isla is the Scottish name of the island of Islay in the Hebrides and of the river Isla, pronounced EYE-la, and is usually glossed as "island". Actress Isla Fisher introduced it to American audiences, and it has been a top 10 name in Scotland and England for years. Isla was almost unused in the United States in 2000, at number 3550, reached the top 100 in 2018 and ranks twenty-eighth in 2025.