بسم الله الرحمن الرحيم
(Fatwa: 569/480/B=1433)
May she be blessing for you, may Allah make her pious and righteous and may she be given longevity and prosperity! You can keep any of the two names: Maryam or Maryam Zahra. Both names are right.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
