Final answer:
Maryam is not required to make up the two rakat of Salatul Istikhara according to the Hanafi school of Islamic jurisprudence, since it is a non-obligatory prayer, although she may choose to pray again for guidance.
Step-by-step explanation:
The question pertains to whether Maryam has to make up the two rakat (units of prayer) of Salatul Istikhara she missed due to a family emergency, according to the Ahnaf (Hanafi school of thought in Islam). In Islam, prayer, or Salat is a crucial component of the faith and is second of the five pillars of Islam, which also include Shahadah, Sawm Ramadan, Zakat, and Hajj.
Salatul Istikhara is a special prayer seeking guidance from Allah in making a decision. According to the Hanafi school, missed obligatory prayers must be made up, while non-obligatory prayers (like Salatul Istikhara), which are broken, do not necessitate Qada' (the performance of a missed prayer) as obligatory prayers do.
Therefore, in the particular school of thought referred to as Ahnaf or Hanafi, Maryam would not be strictly required to make up the missed Istikhara prayer, though she may choose to do so if she still seeks that guidance.