No question that it is only a theory that Priscilla wrote Hebrews, but it is by no means a casual theory. Ruth Hoppin's book, "Priscilla's Letter", contains very thorough research and meticulous scholarship. The question of authorship may never be resolved to everyone's satisfaction, but neither can Priscilla be easily dismissed as a serious possibility. It's also interesting to note that her name is mentioned ahead of her husband's 3 out of 6 times they appear together (as Priscilla and Aquila or Prisca and Aquila). Whether or not Aquila was with her when she taught Apollos, she did teach him -- with Paul's blessing.

Linda L. Belleville (whom Woodie and I have met and had dinner with on several occastions) writes about both Phoebe and Junia in her essay on Women Leaders in the Bible (in "Discovering Biblical Equality" - InterVarsity Press, pgs. 110-125). About Phoebe, she says that her designation as "servant" and "helper" in some translations (e.g., NKJV, NASU, NIV) causes readers to miss the official nature of her official commendation by Paul as a church leader (deacon or minister) and patron (financial supporter of his ministry and travels) - Rom. 16:1,2).

As to whether Junia was really a male named Junias (as in English translations done from the 1940s to the early 1970s), she says, "The masculine name Junias does not occur in any inscription, letterhead, piece of writing, epitaph or literary work of the New Testament period. The feminine Junia, however, appears widely and frequently...in first century inscriptions from such familiar New Testament locales as Ephesus, Didyma, Lydia, Troas and Bithynia. 'Junia' is found as well on tombstones -- especially in and around Rome." (Another speaker I heard says that changing Junia to Junias in order to claim that this apostle was a male is equivalent to changing ElizaBETH to ElizaBERT -- the name simply doesn't exist in the ancient world).