Am I a kohen

I am fully Jewish with me being unable to find 1 goy that I am related to. If I recently found that one of my paternal relatives (my great x3 grandfathers brother or paternal first cousin) is a kohen. My source is a quote i found about him, "Forabbink, Gyula Groszmann a kohanita." Or in English, "Our Chief Rabbi, Gyula Groszmann Hakohen." He was the chief rabbi of a small municipality in Hungary/ Slovakia. I would share a link to the pdf but it is kind of broken and the link no longer works. Would that make me a kohen? Also I carry the same surname.

Thank you for your question.

Since you did find some evidence that you might be a Cohen, you would have to be stringent and assume that you are a Cohen with regard to the prohibitions of not becoming impure by being in the vicinity of a dead body (טומאת מת), and it would be also forbidden for you to marry a divorcee. However, with regard to receiving an Aliyah to the Torah as a Cohen or Birkat Kohanim, you would need to investigate further and would need more evidence in order to allow you to perform the mitzvot of the Kohanim.