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Isn't avuncular marriage considered incest in Judaism? Doesn't that mean that Moses was a product of incest since his mother was married to her nephew?

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    Why do you think it is? – mevaqesh Jan 3 '17 at 7:42
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    I have no clue. That's why I asked. – Νίκος Πάφρας Jan 3 '17 at 8:01
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    You didnt ask "is it" you asked "isnt it" which makes an implicit assumption. No matter...answer on the way... – mevaqesh Jan 3 '17 at 15:47
  • And Ya'akov married two sisters and Shimon (according to some) married Dina and Sara was Avraham's niece Yiskah and Yehoshua married a zonah (rachav) and... – Isaac Kotlicky Feb 2 '17 at 17:25
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Avunculate marriage is marriage between an uncle and a niece or between an aunt and a nephew.

The latter is Biblically forbidden (Leviticus 18:12-3). The former, however, is not, and the Talmud actually encourages it (Yevamot 62b-63a).

Interestingly, R. Saul Lieberman z"l contends that the Talmudic encouragement for marrying one's niece, was specifically meant to counter a Sadduceean position that banned marriage to nieces, in spite of the lack of explicit Biblical prohibition. (Tosefta Ki-fshutah (New York: JTS, 1973) pg. 915).

Regarding Moses, he was indeed the product of a union that was subsequently forbidden after the Law was given. (Exod. 6:20). Regarding a possible violation of Noahide incest laws, some state that she was a paternal aunt, rather than a maternal aunt. (Yalkut Shim'oni B'reshit: 25, cf. Rashi Exod. 6:20). Others are of the opinion that Noahide law does not include a prohibition to marry an aunt (cf. Sanhedrin 58a, Hilkhot Issurei Biah 14:10).

Interestingly, Hizkuni suggest in his commentary to (Exod. 6:20) that Moses' lineage wasn't a bug; it was a feature! It is good for a leader to have some stain in his past to prevent him from excessively glorying over his subjects.

For a lengthy discussion of all things avuncular and Jewish, see here.

  • 1. Regarding a possible violation of Noahide incest laws - I think both opinions are mentioned in the Gemara there. – Shmuel Brin Oct 18 '17 at 1:57
  • 2. to prevent him from excessively glorying over his subjects. - Almost positive the Gemara in Yoma says the same about Dovid (though I'm not sure if it's about his lineage). – Shmuel Brin Oct 18 '17 at 1:57

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