Suppose a Jewish woman converts to Christianity. Her children find out about their Jewish ancestry and decide that Judaism is right for them. Do they have to go through a conversion process? Does it matter if the coversion to Christianity happened many generations ago, and the decendents want to be Jewish (suppose the line is strictly maternal all the way down to child).

  • dupe? judaism.stackexchange.com/q/7775/759
    – Double AA
    Commented Apr 11, 2013 at 23:31
  • 2
    @DoubleAA, I figured that this question has already been asked, but I couldn't find it. I don't think this is a really a duplicate of that one, although definitely similar. The answer to that question makes clear that there are definitely complications in specific cases, so I'm asking about a specific situation.
    – Daniel
    Commented Apr 12, 2013 at 0:48
  • dupe? judaism.stackexchange.com/q/19120/759
    – Double AA
    Commented Jan 20, 2015 at 16:23

2 Answers 2


I give an answer to a similar question at My great great grandmother was Jewish - am I? The main problem is how long ago this occurred and what evidence is being brought. Additionally, there are references to Conversos who underwent "conversion" to show that they had totally rejected the (invalid) attempt to convert to a different religion and were coming back fully and completely (once they had escaped from Spain).

I also point out that I knew people who had performed a conversion misafek (because of doubt), because they did not have full legal proof even though all the evidence available appeared to show that they were Jewish.

You would need to check with an expert rav as to whether your particular evidence is sufficient to not require a geirus misafek.

In any case, the showing of the commitment is still a good thing and emphasizes the return.


I don't think it's possible to convert out of Judaism. I don't have good source, but I would assume that a Jew remains Jewish and requires no conversion no matter what he does (ישראל אע״פ שחטא ישראל הוא ?)

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    recommended reading for you books.google.com/…
    – Double AA
    Commented Apr 11, 2013 at 23:32
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    Very good read @Double AA.
    – user2088
    Commented Apr 12, 2013 at 19:50

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