With a reference to the last word of the previous chapter. The interview with Nicodemus is, apart from the important truth which it embodies, an illustration of Christ's knowledge of what was in man. Godet truthfully observes that John reminds us by the word ἄνθρωπος (man), that Nicodemus was a specimen of the race which Jesus knew so well.
Named Nicodemus
Literally, Nicodemus, the name unto him. The name means conqueror of the people (νὶκη, victory, and δῆμος, people), though some give it a Hebrew derivation meaning innocent blood.