Kohen marrying woman not fit for him to marry
Question
Answer
Shalom!
Thank you for your question.
For the benefit of our readers, allow me to begin with some words of introduction.
The term “Chalal” refers to a Kohen who has been disqualified from the Kehuna, the Priesthood. Such a person is considered to be a “non-Kohen” for all practical purposes. As such, he may not receive the first Aliyah at the Torah, he may not perform the Birkat Kohanim, and he IS permitted to tend to the dead.
A child born from parents who are disqualified from being in a “Kohanic” relationship is a Chalal. In other words, if a male Kohen has a child from a women he is forbidden to marry then that child is a Chalal.
As you correctly note, a woman who had a relationship with a non-Jewish man is forbidden to marry a Kohen. If such a women did give birth to a child from a Kohen, whether in the course of a marriage or outside of marriage, the child is a Chalal.
Other examples of producing a Chalal is a Kohen who has a child with a convert or divorcee. So too, the child of a female Chalal (“Chalala”) is also a Chalal. There is also a concept of “rabbinic level Chalal” but that is not relevant to your question and is beyond the scope of this response.
The Halacha does not differentiate between those who sinned knowingly or unknowingly and unfortunately a woman who is unfit for Kehuna due to any reason remains unfit for Kehuna.
Source
EH chapter 6 and 7 and commentaries