How old was the Virgin Mary when she gave birth to Jesus?

That's kinda unlikely.

I think the Jews not only traditionally had young marriages, but also tended toward arranged marriages. This pushes the age as youbg as possible while still being of age. Since Jewish men and women have bar (and bat) mitzvahs, around 14 or 15, I'd say that's her likely age.

Undoubtedly you would have believed Saint Clement of Alexandria, who was a saint in the Martyrology of the Roman universal church, and who, in support of the great lie, speaks of the time that some imaginary midwife, who was supposed to be at the birth of Jesus, (Non-biblical) told some woman by the name Salome, that the mother was still a virgin after the birth and that her hymen was still intact, and that this supposed Salome, stuck her finger into the mother’s vagina to check, and her hand immediately withered up, but the baby Jesus reached out and touched her hand and healed it. (All non biblical).

Down to the 17th century, Clement was venerated as a saint. His name was to be found in the Martyrologies, and his feast fell on December 4. But when the Roman Martyrology was revised by Clement VIII (Pope from 1592 to 1605), his name was dropped from the calendar on the advice of his confessor, Cardinal Baronius. Pope Benedict XIV in 1748 maintained his predecessor's decision on the grounds that Clement’s life was little-known; that he had never obtained public cultus in the Church; and that some of his doctrines were, if not erroneous, at least highly ‘suspect.

"ERRONEOUS? HIGHLY SUSPECT?" they certainly got that right, but by the 15th century the false teaching of the so-called virgin birth had become firmly established in the minds of the gullible multitude.

Who cares? So what? What's the point? What does it prove? What does it disprove? What does it change?

Who cares? Not biblical ignoramuses who attack that which is beyond their capacity to comprehend, that's for sure.

The great grandfather of the biblical Jesus was Yehoshua/Jesus III, who was the high priest in Jerusalem from 36 to 23 BC and is believed to have been murdered at the orders of Herod the Great. The sonless Yehoshua, had three daughters, Joanna, Elizabeth and Anna/Hanna.

Knowing that his Zadokian lineage would become extinct unless his ageing daughters were placed with future husbands according to the Torah, he married them off to chosen husbands.

The young Davidian prince Heli, [Alexander Helios III] the son, or adopted son of Mattathias ben Levi, was chosen by Yehoshua/Jesus III the high priest in Jerusalem, as the candidate to marry his daughter Hanna/Anna.

Revealing that the marriage of Mary’s parents was an arranged marriage.

Jehoshua III, the High Priest until 23 BC, is supposed to have died three years before the birth of his granddaughter ‘Mary.’ If it was his death that ended his period as high priest in Jerusalem in the year of 23 BC, this would mean that Mary was born in 20 BC and as Herod the Great died in 4 B. C. two years after the birth of Jesus in 6 B. C., This would make Mary about 14 when she gave birth to Jesus the biological son of her half-brother, Joseph the son of Heli/Alexander Helios. See Luke 3, 23.

IF God thought that was important enough, He would have clearly revealed it.
Why then are you concerned about this?

For those who seek to hear from a True Prophet of God, then go to DiscipleDave(dot)com.
But know this, This last days generation will NOT believe most of the videos that God has revealed to me, which most likely will be you too.

New International Version ZECHARIAH 13, 3; And if anyone still prophesies, their father and mother, to whom they were born, will say to them, ‘You must die, because you have told lies in the LORD’s name.’ Then their own parents will stab the one who prophesies.

It's all speculation because there is no evidence and I can't find a reason for the answer to that question to matter.

And the reason you have found no evidence as to the age of Mary when she became pregnant to her half- brother Joseph ben Heli, is because you have not investigated the subject deeply enough.

Do you know who the mother of Mary is? DO you know who the father of Mary's mother is, and in what year he died in relation to the birth of his grand-daughter Mary?

I would be interested in finding out
1. Where you obtained all your information from
2. why it is matters, which you neglected to address.
I doubt you have any evidence to prove any of the claims you made, but I do not like to discount anything without evaluating the data.

Alexander Helios III, AKA HELI, an heir to the throne of David and the father of Joseph ben Heli See Luke 3: 23; was the Father of both Mary and her half-brother Joseph the biological parents of Jesus by different mothers.

In thirteen B.C. Alexander Helios was murdered at the command of Herod the Great as a threat to his throne. The zealots, whose aim it was to free Israel from the cruel yoke of Roman rule, then took the seven year old Mary up to northern Galilee and brought her up under their care in the little village of Nazareth while her mother Hanna remained in Jerusalem where she never left the temple day and night worshipping and fasting and praying.

When the messenger of God told the young 13-14-years-old Mary, while in Nazareth, that she was to become pregnant and bear a son who God would make king as his ancestor King David was and that her aunty Elizabeth was 6 months pregnant, she packed her bag and with her Zealot chaperon travelled down south to the land of Benjamin, to the house of her aged aunty where many family members and friends had gathered to rejoice with Elizabeth. LUKE 1; 41; When Elizabeth heard Mary's greeting, the baby moved within her. Elizabeth was filled with the Holy Spirit and said in a loud voice, “You are the most blessed of all women, and blessed is the child you will bear! Why should this great thing happen to me, that my Lord's [FUTURE KINGS] mother comes to visit me? For as soon as I heard your greeting, the baby within me jumped with gladness. How happy you are to believe that the Lord's message to you will come true!”

How did Elizabeth know what the messenger of God had said to Mary while she was still up north in Nazareth, and was her half-brother, young Joseph the son of HELI, there with the visitors in the house, was Elizabeth among the conspirators to put a descendant of king David on the throne and free themselves from the yoke of Roman rule?

Three months later, the unmarried pregnant Mary returned to Nazareth where she was accepted by Joseph ben Jacob a descendant of the cursed genetic line of Jehoiachin to be his wife, this would have been a marriage of convenience as Herod’s advisors would never see a descendant of Jehoiachin as a threat to Herod’ s throne.

But because Joseph the son of Alexander Helios and any male offspring of his, would have been seen as a threat to the throne of Herod the Great as was his father, the biological father of Jesus had to remain hidden, and for the safety of the child, the pregnant Mary, was married off to Joseph the son of Jacob, a descendant of the cursed genetic line of King Jehoiachin.

Herod’s chief advisers, would not have seen Jesus, who they believed was the son of Joseph ben Jacob as a threat to the throne of Herod, because Mary, unbeknown to the Jewish authorities was already pregnant to her half-brother “Joseph the son of Alexander Helios,” and was taken to wife by Joseph the son of Jacob from the tribe of Judah. This Joseph ben Jacob, who married the already pregnant Mary and who was only the foster-father of Jesus, was a descendant of Solomon through the cursed line of Jehoiachin, of whom we read in Jeremiah 22: 30; “This man is condemned to lose his children, to be a man who will never succeed. He will have no descendants who will rule in Judah as David’s successor. I, the Lord, have spoken.” This rules out the hope of any son of Joseph ben Jacob ever sitting on the throne of David, whereas Jesus the son of Joseph ben Heli=Alexander Helios was a legitimate successor to that throne.

According to Torah law, Nathan the son of Bathsheba and Uriah the Hittite and adopted son of King David, and Nathan’s descendants, were legitimate heirs of King David, but not in the ancestral line of the promised Messiah, who was to be born of the seed of Solomon, until Naria the descendant of Nathan coupled with Tamar the descendant of Solomon, to produce Salathiel the ancestor of Jesus, who has been made High Priest (From the tribe of Levi=Nathan) and King (From the tribe of Judah=Solomon) in the order of Melchizedek.

David Hughes the noted Genealogist of the Ancient World Lineages, states that King Jeconiah’s only son, with Queen Tamar, ‘Prince Zedekiah,’ died prematurely in childhood, and in 586 BCE King Zedekiah, the last king of Israel, whose original name Mattaniah, was the son of Josiah and the uncle of Jehoiachin. King Zedekiah/Mattaniah, was taken prisoner and his sons were executed in front of him, after which, his eyes were gouged out, and there in Babylon, he remained blinded in exile for the rest of his life and it appeared that the entire royal lineage of King David through God’s chosen son, Solomon, had been exterminated.

With all the known direct lineages of male heirs to the lineage of King Solomon the son of King David and Bathsheba now extinct, Queen Tamar II became the dynastic heiress preserving not only the Lineage of King Solomon, but also became the inter-dynastic link, or the vital crossover heiress merging the non-royal Nathan lineage with the royal lineages of King Solomon. With the addition of Tamar representing the mainline descendants of King David, we now can understand the linkage between the two prime royal and non-royal lineages to the ancestry of the Jewish Messiah Yehoshua ben Yosef (Jesus son of Joseph the son of Alexander Helios a descendant of Nathan). Jesus carried in his genes the potent fusion of Davidian and Zadokian bloodlines.

He carried the potent bloodline of the royal mantle as a Priest-King of Israel and the messianic mantle as the Maschiach Yisra’el (Messiah of Israel) of the House of David. Hebrew 5: 10; “And God declared him (Jesus) to be high priest according to the priestly order of Melchizedek.” Melchizedek held the titles of both King and high priest. Hebrew 5: 5; “In the same way, Christ did not take upon himself the honor of being high priest. Instead, God said to him, ‘You are my Son; TODAY I have become your Father.’”