WHO WROTE TO HEBREWS?
Hebrews 1.
It is unknown who wrote the letter to Hebrews. Perhaps it was Apollos. According to Acts 18.24-28, he was a well-read Hellenistic Jew from Alexandria in Egypt.
Martin Luther guessed that he wrote it.
Tertullian (150-230 AC) said that Hebrews was a letter of Barnabas.
Adolf Harnack and J.Rendel Harris speculated that it could have been written by Priscilla (Prisca).
William Ramsey suggested that it was done by Philip.
However, the traditional position is that the Paul wrote Hebrews.
Eusebius (263-339?AD) also believed that Paul wrote it.
About the end of the second century, Clement of Alexandria thought that the Paul originally wrote the letter in the Hebrew language, and it was later translated by Luke, or someone else into Greek.
The New International Dictionary of the Bible. J. D. Douglas, Merrill C. Tenney
~ Apollos according to Paul and to Aquila and Priscilla, Apollos was quite untrained in the Word of GOD and was in need of guidance from mush more experienced Christians who know and understood the Gospel of Christ much better than just ordinary believer. Certainly, Apollos is not the author of Epistle to Hebrews.
~ Barnabas, while being good supporter and great help for Paul in his missionary journeys, he is not known for his preaching of the Gospel, and it seems did not wrote anything to anyone as John, Paul, and Peter did.
~ Aquila and Priscilla are very well educated in the Word of GOD and certainly have good knowledge and understanding of the Gospel of Christ, but again, they couldn't possibly write the Epistle to Hebrews, because they are also not known for any of their teachings, preaching, or writings about Christ and His Gospel.
~ Concerning Philip (Acts 8.5-8.12.26-40), as a author of Epistle to Hebrews, this suggestion has a certain possibility. About Philip is written very little, but he was actually very well known in the city of Samaria in which he teaches Gospel and performed miracles. Philip is one of those who was taken by the Holy Spirit to meet Ethiopian eunuch whom he converted to Christ. Philip was taken by the Holy Spirit to "Azotus (Ashdod) and as he passed through, he kept preaching the Gospel to all the cities, until he came to Caesarea." (Acts 8.40, 21.8-9).
Philip is certainly very well educated in Gospel, he is the one of Apostles of Christ who has been with Christ from the beginning, preached and performed sings by the Holy Spirit, and very well could write about the life of Christ, but he did not. If he wrote the Epistle to Hebrews, he is certainly would be well known for such great work and well praise for such wonderful and exceptional writing.
According to the style and the spirit of the Book to Hebrews, it is closely matching the writing and the style of Paul in all its variety and diversity of thoughts and deepness of the meanings. And who else knows Paul's people the Jews, better than Paul himself?
The Book to Hebrews is very special Book like no other. The message to Hebrews is not the same as to Gentiles, because Gentile insufficient in the knowledge and understanding of the Hebrew Scriptures, and cannot link together the Old and the New Covenants of GOD with His people. And so, at the very beginning of His writing to Hebrews, Paul carefully started from the very beginning, from the GOD Father and His Son (the Messiah, for Whom the Jews are waiting for), through Whom the GOD Father created all things, the world, and Whom the GOD Father appointed over the world (2).
(John 1.3) (Acts 2.22) (1Corinthians 8.6) (Colossian 1.16-17) (Hebrews 1.2).