Since When Did God Know You?

Did God know YOU before you were born? And if so, when did God “start” to know you, by name? From the foundation of the world? Before the foundation of the world? Before time began? The Bible has much to say about God’s “foreknowledge” and the fact that some have been “predestined” to be ”called” for salvation in this day and age.  What exactly does this mean for YOU?