In the Creed, "begotten" refers to nature (that Jesus is God) in opposition to heresies of the time placing Jesus less than the Father. "Eternally begotten" meaning eternally God, always YHWH, and this not changing with the Incarnation.I agree with that. It is what I mean by 'eternally begotten.' But if He was not begotten in some way, then in what way is He the Son?