What’s in a name?

Shakespeare wrote that which we call a rose by any other name, would smell as sweet.

My interest is on how do names come about? How did I end up being referred to as a Luo, Kenyan and African? Who is it that confers a name? My other names relate to the time of my birth and all. Would it still be me if the names were changed?

Why for example did the Europeans coming to Africa invent tribes- where they found nationalities? What did they find different in Africa from where they had come from?

It is this historiography that interests me.