What word describes the heresy of "Jesus is the Son of Himself"? Preface

This question is the result of a personal thought experiment and is for curiosity sake.  I do not profess nor believe the following statement.

Background

Those who believe in the Trinitarian Nature of God believe that God is Three persons in co-equal majesty and substance in one God.  It is accurate to say that Jesus is God, the Holy Spirit is God, and the Father is God.  But in the conventional Trinitarian belief, it is wrong to say that the Father is the Son, the Son is the Holy Spirit, etc.  

However, suppose a heretic accepts the first statement (each person is God), but rejects the second one (that the persons can substitute one another).  An inference that could arise is the following:


The Son of God is God
The Father is God
Therefore Jesus (The Son) is the Son of himself.


Question

Is there a word for the Heresy that describes the third step of the syllogism above?
I think this could be considered a type of modalism: the belief that there is only one person of God, who appears in different times or contexts as the father, son, and holy spirit, but does not by nature have true relations between these. In modalism, "father" and "son" are only labels for human benefit, not true descriptions of how God is, and so you could get the nonsensical conclusion that Jesus is his own son.