Because they were of Davidic lineage & were very faithful to God.
Tradition tells us that her parents were named Anne and Joachim.
Joachim and Anna - The Gospel of the Birth of Mary written by St Matthew.
The mother of the Blessed Virgin Mary was St. Anne and her father was St. Joachim.
We only know the names Anne and Joachim from the apocryphal Gospel of James. There is no verification elsewhere to verify this. There is also no factual information about their ages when Mary was born except for the tradition that Anne was approaching the end of her child bearing years.
If you are referring to the Blessed Virgin Mary, there is nothing in scripture about her family. We must rely on undependable apocryphal writings for that information.The Gospel of James, also known as the Infancy Gospel of James or the Protevangelium of James, is an apocryphal Gospel probably written about AD 145, which expands backward in time the infancy stories contained in the Gospels. That writing gives us the names of Anne and Joachim as the the parents of Mary. If these were the actual names we do not know but, lacking other information as verification, these are the names the Church assigns to them.
It is not directly stated in the Bible. Popular tradition says her parents were named Anne or Anna ( which means Grace) and Joachim. the Agreda ( City Of God) is in effect a Marian biography but is largely based on unsupported theorizing.The exact year is not known. However, it was probably about the year 20 B.C.Mother Mary's birthday is celebrated on September 8thThis is hard to say, as they got married young then, and Mary was only engaged to Joseph. Also there were no records of birth and death like today.
We know the names of her parents but not the names of Mary's grandparents.
Anna Povalova parents are Lyubov Foedorovna and Lazarkov
Anna.
Anna Baldwin's parents were Ebenezer and Luan Baldwin, who were from Connecticut.
Anna Gracemans parents names are not listed in her official biography. Her mother played classical music until Anna was born. Her parents were very poor when Anna was growing up.
Eleanor Roosevelt's parents were Elliott Roosevelt and Anna Hall Roosevelt.