What is with my name?

So this is what I do not understand about my name. Why is it that if people do not know how to say they make it up in such a way that they add a bunch of letters that are not there. For example one of the older children here, had seen my name written down and so he comes up and calls me Auntie Sarshe. Now how you get an extra sh out of it I don't know. Now one might think "well he is just a child" but it is not only children who do this. Honestly! Where do people learn to read? But as far as this child goes we solved the problem. He calls me Auntie Sharshe and I call him Marmar (his name is Martin) So in the end it all works out.