I’m just curious, is your name Cohen? Do all Cohens have to have that last name or a derivative? If not, how would you know you are a Cohen?
My first thought upon reading your post, is why would you care about being a “Cohen” if you are converting to reform Judaism? Reform Judaism doesn’t recognize such special statuses:
“The majority of Reform Jews and Reconstructionist Jews consider all rules and ceremonies regarding the priesthood to be outdated. Many consider it to be anti-egalitarian, and thus discriminatory against Jews who are not Kohanim. Thus the above laws and customs are no longer observed in Reform or Reconstructionist Jewish communities. Many Reform and Reconstructionist Temples effectively forbid the practice of these laws and customs. Both Orthodox and Conservative Jews strenuously disagree with this latter view.”
I do know that you wouldn’t be considered a Jew under Orthodox law, much less a Kohen, if you convert to Reform Judaism since Orthodox Judaism doesn’t recognize Reform Judaism conversions as being valid - so the Cohen question is kind of moot:
(from Wikipedia:Orthodox Judaism)
“Orthodox Judaism maintains the traditional understanding of Jewish identity. A Jew is someone who was born to a Jewish mother, or who converts to Judaism in accordance with Jewish law and tradition. Orthodoxy thus rejects patrilineal descent. Similarly, Orthodoxy does not allow intermarriage. Intermarriage is seen as a deliberate rejection of Judaism, and an intermarried person is effectively cut off from most of the Orthodox community. However, some Chabad Lubavitch and Modern Orthodox Jews do reach out to intermarried Jews.”
So you’d have to go through an Orthodox conversion to be considered an Orthodox Jew.
Also, from the “Kohen” article cited above:
“The Torah prohibits a Kohen from marrying women of certain specified categories: A divorcee, a “defiled” woman, or a “harlot”. It ordains that any Kohen who makes such a marriage loses his priestly status [Lev. 21:6–7]. The Talmudic understanding of the word “harlot” also encompasses the meaning “proselyte” (or “convert”). According to the Talmud the act of marriage, although prohibited, was effective if a Kohen married in disregard of the prohibitions. Any children born of the union are legitimate.”