20 Now there were certain Greeks among those who came up to worship at the feast.
21 Then they came to Philip, who was from Bethsaida of Galilee, and asked him, saying, “Sir, we wish to see Jesus.”
22 Philip came and told Andrew, and in turn Andrew and Philip told Jesus.
These Greeks (v. 20) weren't Grecian Jews, but native Greeks who had become proselytes to the Jewish faith. They came up for Passover.
This event is perhaps a type — While Jesus's own countrymen sought to kill Him, Gentiles turned to Him.
Philip = lover of horses — a Greek name
wish (v. 21) = asked reverently (Haggai 2:7)