Is the sisterhood of the woman who claims to be the deceased's sister proven if the deceased's maternal brother acknowledges her sisterhood, a DNA report confirms it, and a relative of theirs testifies to it?

If the lineage of the daughter to that mother is established, she has the right to inherit from her. Lineage is established by the testimony of two just witnesses, not by fingerprints. So, if their relative and the brother witness are both just, their testimony is unanimously accepted. The brother's acknowledgment alone is not sufficient; rather, he must bear witness to the establishment of the lineage. If the brother is not just, but provides testimony indicating that the girl is his mother's daughter, this establishes a right for her in his inheritance, to the extent that his acknowledgment reduces it.