Re: Name changing after marriage
As per my knowledge, everyone will be called by father’s name.
This is quite authentic Hadith
*Imam Bukhari (RA) has included the following subtitle in his Sahih, ‘Chapter on the fact that the people will be called by their father’s name’. Under this chapter, he has recorded the narration of Sayyiduna ibn Umar, Radi-Allahu anhu, that Rasulullah Sall-Allahu alayhi wa sallam said, 'Verily, a banner will be raised for the treacherous person on the day of Qiyamat and it will be proclaimed, ‘This is the treachery of so and so, the son of so and so.’ (Sahih Bukhari Hadith 6177) (Note that the masculine tense was used for the parent of this ‘so and so’.)
*There is another Hadit which is not authentic (weak)
*people will be called by their mother’s name so that children that were born by adulterous acts will not be made public.
*Allah behter janta hai.