'Unknown' in the Bible

So the abundance will be unknown in the land because of that subsequent famine; for it will be very severe.

For while I was passing through and examining the objects of your worship, I also found an altar with this inscription, ‘TO AN UNKNOWN GOD.’ Therefore what you worship in ignorance, this I proclaim to you.

as unknown yet well-known, as dying yet behold, we live; as punished yet not put to death,

I was still unknown by sight to the churches of Judea which were in Christ;