So to the film obviously "Ave Maria" is meant so this must have been Mary the mother. Note the film's web site says Virgin Mary - the word virgin is not reported as found on the boxes
How many Mary in Jerusalem in those days? The Bible itself has several. It was a very widely used female name.
I always understood Mary went to Ephesus with the disciple John and was buried there.
Some of the statistical imaginings are based on how many Jesus would have a Joseph as father and a mother Mary - but nothing in the tomb says that the Maria is the mother of this Jesus - she could also be the wife of the Jesus in the tomb or the wife of the Matia or even the Judah.