Adam Clarke on John 4:46

Where he made the water wine - See the notes on Joh 2:1, etc. Cana was on the road from Nazareth to Capernaum and the Sea of Tiberias.

A certain nobleman - An officer of the king's court: for this is the meaning of the original word, βασιλικος, which the Vulgate translates regulus, a little king. This officer belonged to Herod Antipas, who was then tetrarch of Galilee. Jerome calls him Palatinus, and says he was an officer of the king's palace. Others think it was Chuza, mentioned Luk 8:3; and others think it was Manaen, spoken of Act 13:1. One of these opinions may be true, but all solid proof is wanting. This officer, whoever he was, appears to have had his ordinary abode at Capernaum, and hearing that Christ was at Cana, he came express from Capernaum thither, to entreat him to heal his child.