I have read about alpha, but back in time there was another notation, using the vertical sign |. I'd like to know how they pronounced it.
EDIT: with a bit of more research, I've actually found that the vertical sign was iota, the only letter which wasn't used due to being the first of the number name. Here's the link: http://www.omniglot.com/writing/greek.htm. So, was hen the name of 1?