Why is Jesus the Son called the Father in Isaiah 9:6?

In providing this answer with respect to recognizing the Trinity in the Old Testament, I noticed that Jesus is called the Father which could be confusing when trying to understand the Trinity. **In what sense is Jesus the Father but certainly not the Father?** >For to us a child is born, to us a son is given, and the government will be on his shoulders. And he will be called Wonderful Counselor, Mighty God, **Everlasting Father**, Prince of Peace. (NIV Isaiah 9:6) **Please do not answer unless your answers uphold the doctrine of the Trinity**. I do not want the debate about the trinity to confuse the question. The answer must assume the Trinity is true, that is the Father, Son and Holy Spirit are equal yet different persons that share the same single divine nature and therefore are called the One and true God.