According to Halacha, if there are Jewish male conjoined twins, how many circumcisions are needed? Do both penises need it, or only one?

  • 3
    Are they both Jewish?
    – shmosel
    Mar 20 at 4:51
  • 1
    How many foreskins do they have? Mar 20 at 6:53

1 Answer 1


The Bais Yitzchak YD 2 99:3 says that they would require two circumcisions. The reason is because the mitzvah is to remove the orlah, and since there’s two, they both must be removed. However, tefillin is a mitzvah on the person, not the head, and therefore the Gemara questions if he’s one person or two in that regard but for a bris it is clear that he would need two.

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