What is an English Name

A group of kids were playing outside our house one evening. A woman who was talking to a neighbour asked one of the boys what his name was. The boy who was about 7 years old replied "Yang Yang". The woman continued "But don't you have an English name?" to which the boy gave her a puzzled look but did not reply. When the woman repeated her question, the boy annoyedly replied "Yang Yang lah! That's my English name!" I could not help but laughed inside. The boy appeared to have more brains that that woman.