Isla is the Scottish Gaelic word for "island," and the name of an island in the Inner Hebrides off the west coast of Scotland — known internationally for its whisky distilleries. As a given name, Isla is a relatively recent development, popular in Scotland from the late nineteenth century and spreading outward.
Its current popularity is driven by the silent-S spelling: parents love that it looks unusual but reads as a familiar EYE-lah sound. top 50.
Isla does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
—
In Pythagorean numerology the letters of Isla reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.