Ultimately, however, there are names which do have to be changed since they are simply not saints' names at all. Some change to a name which is similar to their own. An obvious example is that of those who change from Neil to Nil. Similarly Lee can easily be changed to Leo or Leon. There are many other examples.
Some people have second Christian names.
Thus someone called Pamela Mary could simply use her second Christian name as her Orthodox name. Some people simply have a favourite saint and have always wanted to be called by that name. This is the simplest case of all. Others may wish to take on the name of someone in their family. Thus we know of one little Russian boy who was not baptised and did not have a Christian name.