Well, actually it is a bit more complicated than just God having a (or more than one) son: „The Christian doctrine of the Trinity […] holds that God is one God

Well, actually it is a bit more complicated than just God having a (or more than one) son: „The Christian doctrine of the Trinity […] holds that God is one God, but three coeternal and consubstantial persons: the Father, the Son (Jesus Christ), and the Holy Spirit. The three persons are distinct, yet are one ‚substance, essence or nature‘. In this context, a ‚nature‘ is what one is, whereas a ‚person‘ is who one is“, from [0] where you can also read a lot more about it. [0] https://en.wikipedia.org/wiki/Trinity https://en.wikipedia.org/wiki/Trinity