Of Latin origin; "fortunate"; Fortunatus, a Christian -- Fortunatus.
Thayer's Greek Lexicon
Strong's 5415: Φορτουνᾶτος
Φορτουνᾶτος (or Φουρτουνατος R G), Φορτουνάτου, ὁ (a Latin name, 'happy'), Fortunatus, a Christian of Corinth (cf. Lightfoot on Clement of Rome, 1 Cor. 59(65 [ET])): 1 Corinthians 16:17.
1 Corinthians 16:17 - N-GMS GRK:Στεφανᾶ καὶ Φορτουνάτου καὶ Ἀχαϊκοῦ NAS: of Stephanas and Fortunatus and Achaicus, KJV: and Fortunatus and INT: of Stephanas and Fortunatus and Achaicus