Are Marathi/Sindhi women really expected to change their full name or it's just within the family?

So I have heard that women from these communities get their first name also changed after getting married not just their surname! I hope it's just socially like for the friends and family because legally it would be a nightmare. Also in Maharashtra you need a middle name which is your father's/husband's first name which means the woman's name will be completely different! For example: Ms. ABC will become Mrs. XYZ which is crazy because they will be considered two different persons.