Joshuas n their Fathers

Read the previous post on God Provides. So I had two tuition students whose names happened to be the same - Joshua. So on Wed night, I started a new tuition with a girl. And after chatting about her school etc, I discovered that her chemistry teacher is called John. The description fits into one of the Joshua's father. What is amazing is that the first Joshua's father name is also called John. This is really too much of a coincidence. What are the chances that you know 2 tuition students with the same names and whose fathers' names are the same too? Wow!