Imamate of one who officiated a nikah with a step-grandmother

Question

A man has married his mother’s mother, that is, his step-grandmother on his mother’s side. What is the status of this nikah, and is the maternal step-grandmother among the muharramat (women one is forbidden to marry) or not? (2) If she is among the muharramat, what is the ruling for the person who officiated (read) this nikah and for those who attended it? (3) If the one who officiated the nikah is an imam, is the imamate valid for him or not?

Answer

(1) What is meant by “step-grandmother on the mother’s side”? If what is meant is the mother’s stepmother, that is, the wife of the real maternal grandfather, then nikah with her is impermissible: [ar]حَرُمَ أَصْلُهُ وَفَرْعُهُ، وَزَوْجَةُ أَصْلِهِ وَفَرْعِهِ وَلَوْ بَعِيدًا[/ar] “Forbidden [in marriage] are his ascendants and descendants, and the wife of his ascendant and of…

Source: Fatawa Mahmudiyya

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