In the scroll of Ruth it looks that Ruth was subject to Yibum. That is curious. When he was the wife of Mahlon, she was not Jewish. How then would yibum apply? Plus Yibum is only for brothers from the father. Not uncles.
The whole discussion between Boaz and Ploni Almoni would have made sense if they were brothers of Mahlon, not Elimelech.
Plus what was that about if Ploni would buy the field then he would have to marry Ruth?
Just to be clear Yibum is when when one brother marries but then dies before he has children. Then one of hi brothers takes the wife [so that his memory will not be lost. Children that that net brother will have ill be considered a children of the first brother.]
