{And who is he, Lord, that I may believe on him?} (Kai tis
estin, kurie;). The initial kai (and) is common ( Mr 10:26  Lu
10:29  18:26 ). Probably by kurie he means only "Sir." It
usually comes at the beginning of the sentence, not at the end as
here and verse  38 . {That I may believe on him} (hina pisteus(930a)eis auton). Ellipsis to be supplied before this final clause. He
catches up the words of Jesus in the preceding verse, though he
does not yet know who the Son of Man (or Son of God) is, but he
trusts Jesus.