This isn’t an answer but (frequent excuse) it’s too long for a comment.
One of the key indigestibilities of Aristotle, when we were absorbing him in the c13, was precisely the question of the collective versus the individual intellectual soul. The Muslim commentators seemed to be happy with the idea of “the mind of Man” as opposed to the mind of each man; Christians clearly were not. It took Aquinas to disentangle the problem.
In the course of this disentanglement a vocabulary will have been developed to talk about the distinction in Latin, and this with a small amount of realignment will probably give the most natural step towards “Jungius”.
You can tell I’m away from my books! But if you are interested enough to see how essentially the same questions as Jung’s were being handled by the mediaeval renaissance, possible ways in might be Pieper’s Introduction to Aquinas or either Copleston’s History of Mediaeval Philosophy or the relevant volume of his overall History of Philosophy. Thus equipped, you will be in a position to see where in Aquinas to look in order to check the precise technical vocabulary he is using.