I really like Helena pronounced HEL-en-ah, but I can't think of a suitable nickname apart from Helly, which reminds me too much of hell. I think Lena is nice, but when pronounced LEE-nah or LAY-nah it doesn't sound like Helena at all. I like Nell, Ellie, Ella and Elle too, but they sound a little far-fetched.
What do you think of the nicknames mentioned? Do you know anyone named Helena, and does she have a nickname? Thanks.