If you love it, or it holds special significance for you, then sod anyone else!
I love the name, personally, and although I know quite a few Islas under 5 (and an "Ayla", a version of Turkish origin, which is pronounced the same EYE-luh, not AYE-luh, and translates as "Halo of Moonlight"...pretty!), I never think to myself "Oh God, not another one". Because their personalities vary so widely, and each make it their own.