The Son came into existence.

[benadam1974]

For Paul the Son came to be, i.e., into existence: Gal 4.4

“But when the fullness of time was come, God sent forth his Son made [genomenon] of a woman, and made under the Law.”​

The Greek genomenon, from the verb ginomai, according to Bauer’s Lexicon means:

“To come into being, existence through the process of birth.”

Thayer’s Lexicon
“To become, i.e. to come into existence, begin to be, receive being.”​