What is the meaning of John 17:12?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

While I was with them, I protected and preserved them by Your name, the name You gave Me. Not one of them has been lost, except the son of destruction, so that the Scripture would be fulfilled.

Berean Standard Bible (BSB)

While I was with them in the world, I kept them in your name. Those whom you have given me I have kept. None of them is lost, except the son of destruction, that the Scripture might be fulfilled.

World English Bible (WEB)

While{G3753} I was{G2252}{(G5713)} with{G3326} them{G846} in{G1722} the world{G2889}, I{G1473} kept{G5083}{(G5707)} them{G846} in{G1722} thy{G4675} name{G3686}: those that{G3739} thou gavest{G1325}{(G5758)} me{G3427} I have kept{G5442}{(G5656)}, and{G2532} none{G3762} of{G1537} them{G846} is lost{G622}{(G5639)}, but{G1508} the son{G5207} of perdition{G684}; that{G2443} the scripture{G1124} might be fulfilled{G4137}{(G5686)}.

Strong's King James

(12) When I was with them, I kept them in Your name which You gave Me and I guarded and not one of them is lost but the son of destruction so that the Writing is completed.

The F.O.G*

[12] While I was with them, I protected them by Your authority that You gave Me. I guarded them carefully, and none has been lost except the one who chose the path of destruction, fulfilling the ancient prophecy.

The F.O.G Paraphrase

when I was with them in the world, I was keeping them in Thy name; those whom Thou hast given to me I did guard, and none of them was destroyed, except the son of the destruction, that the Writing may be fulfilled.

Young's Literal Translation