Personally I pronounce is Eh-LAY-nah. I'm from the
UK and I asked my mum and my sister and they said they'd pronounce it the same as I do. I like the nickname
Lena (LAY-nuh) for it.
It's been on my list for a while, it's not really high up and I mostly forget about it, but when people bring it up I remember that I really like it :)