Once more he visited Cana in Galilee, where he had turned the water into wine. And there was a certain royal official whose son lay sick at Capernaum.

“nobleman” (KJV) or “royal officer” (NIV) was an official attached to Herod’s court.  We are not told, but it could be Manean in Acts 13:1 or Chuzas referred to in Luke 8:3.

Acts 13:1  In the church at Antioch there were prophets and teachers: Barnabas, Simeon called Niger, Lucius of Cyrene, Manaen (who had been brought up with Herod the tetrarch) and Saul.

Luke 8:3  Joanna the wife of Chuza, the manager of Herod’s household; Susanna; and many others. These women were helping to support them out of their own means.