'Unknown' in the Bible

for, passing through and beholding your shrines, I found also an altar on which was inscribed, To the unknown God. Whom therefore ye reverence, not knowing him, him I announce to you.

as unknown, and well known; as dying, and behold, we live; as disciplined, and not put to death;

But I was unknown personally to the assemblies of Judaea which are in Christ;