I recognise that issue. Obviously my RealName™ is not Ivan. My own name is so common that I have to give my date of birth when I go to the dentist to avoid a clash. In my current home town there are many of us. We are legion. There are even famous people with my name.
We share that problem that getting a gmail account means we are dwilliams2764572846@gmail.com 
But there is a bonus. It gives us level of anonymity. No one is going to find us in a Google search. Facebook gets confused as to which one we are. Haha. Common names are cool. Just get yourself a nick name for your mates. We know you are uniquely you and it is all the other David Williams’ who are copying you.
Now I just got to practice saying Hhbsdnflhg. I assume that is Welsh with the lack of vowels.