Your grandmother's name was pronounced Youannou but the correct spelling is Ioannou, which is a very common surname in Cyprus and it actually means "son/daughter of John".There is a good chance her grandfather's first name was John. Lots of Christian Orthodox families used to live in Alexandria at the time, but now most of them have left. Im not sure why but i can find out easily if u like.Kalymnos is actually a greek island. It is common for Greeks and Cypriots to get married because they are both Orthodox. Let me know if u are interested in more info.Good luck.