Is there any prohibition (Torah or rabbinical) against a Noahide man having relations or even marrying a Zera Yisrael woman who is not halachically Jewish?

For the hypothetical case here, the woman was raised in a reform community, and her grandmother's conversion was likely halachically invalid. If the grandmother does not have a valid conversion, then her daughters and granddaughters would be Zera Yisrael and not halachically Jewish.

Therefore the question then arises, is a Zera Yisrael woman permitted to a Noahide man?

Also, what level of due diligence is a Noahide required to perform when confirming a woman's claim that her grandmothers conversion was not valid? In the mouths of two or more let a thing be established?

  • 1
    Was the grandfather Jewish? If not, then his descendants aren't Zera Yisrael.
    – Harel13
    Commented Oct 2, 2023 at 9:19
  • Hariel, grandfather in this scenario is presumed to be halachically Jewish
    – Forsyte
    Commented Oct 2, 2023 at 9:24
  • 1
    Alright, thanks.
    – Harel13
    Commented Oct 2, 2023 at 9:41
  • 1
    You're asking two different questions here- a) are there any restrictions on Bnei Noach marrying Zera Yisrarel?and b) what level of responsibility does a Ben Noach bear to ensure his wife is not Jewish? These are great questions! But ask them separately Commented Oct 2, 2023 at 10:09
  • Why should there be any restrictions on "Bnei Noach" marrying the so-called "Zera Yisrael"? They are both halachically considered as non-Jews. Commented Oct 3, 2023 at 23:15


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