'So called' in the Bible

What I now write is that you are not to associate with any so-called brother who is immoral or lustful or idolatrous or given to abuse or drink or robbery. Associate with him! Do not even eat with him!

(So-called gods there may be, in heaven or on earth ??as indeed there are plenty of them, both gods and 'lords' ??6 but for us there is one God, the Father, from whom all comes, and for whom we exist; one Lord, Jesus Christ, by whom all exists, and by whom we exist.)

and finally he was seen by myself, by this so-called 'abortion' of an apostle.