I used to live in Northern
Ireland and knew several Aislings, they all pronounced it ASH-leen :)
I like
Aisling and I love the meaning, I prefer it to
Aislinn but I think they would both be pronounced the same.
Ashlyn,
Ashlynn, Ashleen etc, I dislike them all, and I do think they seem dated because of their similarity to
Ashley.
Asha is ok though, I would pronounce it ASH-a.
I know three Ashleys and they are all male, as it's a boys name where I live. They all spell it
Ashley.