New King James Version
They wrote this letter by them: The apostles, the elders, and the brethren, To the brethren who are of the Gentiles in Antioch, Syria, and Cilicia: Greetings.

King James Bible
And they wrote letters by them after this manner; The apostles and elders and brethren send greeting unto the brethren which are of the Gentiles in Antioch and Syria and Cilicia:

American Standard Version
and they wrote thus by them, The apostles and the elders, brethren, unto the brethren who are of the Gentiles in Antioch and Syria and Cilicia, greeting:

Berean Study Bible
and sent them with this letter: The apostles and the elders, your brothers, To the brothers among the Gentiles in Antioch, Syria, and Cilicia: Greetings.

Douay-Rheims Bible
Writing by their hands: The apostles and ancients, brethren, to the brethren of the Gentiles that are at Antioch, and in Syria and Cilicia, greeting.

English Revised Version
and they wrote thus by them, The apostles and the elder brethren unto the brethren which are of the Gentiles in Antioch and Syria and Cilicia, greeting:

World English Bible
They wrote these things by their hand: "The apostles, the elders, and the brothers, to the brothers who are of the Gentiles in Antioch, Syria, and Cilicia: greetings.

Young's Literal Translation
having written through their hand thus: 'The apostles, and the elders, and the brethren, to those in Antioch, and Syria, and Cilicia, brethren, who are of the nations, greeting;

Acts 15:23 Additional Translations ...