2 Corinthians 1:1 Παῦλος ἀπόστολος Χριστοῦ Ἰησοῦ διὰ θελήματος θεοῦ καὶ Τιμόθεος ὁ ἀδελφός τῇ ἐκκλησίᾳ τοῦ θεοῦ τῇ οὔσῃ ἐν Κορίνθῳ σὺν τοῖς ἁγίοις πᾶσιν τοῖς οὖσιν ἐν ὅλῃ τῇ Ἀχαΐᾳ,
Paul, an apostle of Christ Jesus through the will of God, and Timothy our brother, to the assembly of God which is at Corinth, with all the saints who are in the whole of Achaia:
Noun: Dative Singular Feminine

2 Corinthians 9:2 οἶδα γὰρ τὴν προθυμίαν ὑμῶν ἣν ὑπὲρ ὑμῶν καυχῶμαι Μακεδόσιν, ὅτι Ἀχαΐα παρεσκεύασται ἀπὸ πέρυσι, καὶ τὸ ὑμῶν ζῆλος ἠρέθισεν τοὺς πλείονας.
for I know your readiness, of which I boast on your behalf to them of Macedonia, that Achaia has been prepared for a year past. Your zeal has stirred up very many of them.
Noun: Nominative Singular Feminine

1 Thessalonians 1:7 ὥστε γενέσθαι ὑμᾶς τύπον πᾶσιν τοῖς πιστεύουσιν ἐν τῇ Μακεδονίᾳ καὶ ἐν τῇ Ἀχαΐᾳ.
so that you became an example to all who believe in Macedonia and in Achaia.
Noun: Dative Singular Feminine

1 Thessalonians 1:8 ἀφ' ὑμῶν γὰρ ἐξήχηται ὁ λόγος τοῦ κυρίου οὐ μόνον ἐν τῇ Μακεδονίᾳ καὶ [ἐν] [τῇ] Ἀχαΐᾳ, ἀλλ' ἐν παντὶ τόπῳ ἡ πίστις ὑμῶν ἡ πρὸς τὸν θεὸν ἐξελήλυθεν, ὥστε μὴ χρείαν ἔχειν ἡμᾶς λαλεῖν τι.
For from you the word of the Lord has been declared, not only in Macedonia and Achaia, but also in every place your faith toward God has gone out; so that we need not to say anything.
Noun: Dative Singular Feminine