'Unknown' in the Bible

For as I passed along, and observed the objects of your worship, I found also an altar with this inscription: 'TO AN UNKNOWN GOD.' What therefore you worship in ignorance, this I announce to you.

as unknown, and yet well known; as dying, and behold, we live; as punished, and not killed;

I was still unknown by face to the assemblies of Judea which were in Christ,