The Daily Star says United have been watching the situation and are open to taking Endrick on loan for the second half of the season.
However, they face competition from Villa, which could have the edge given the La Liga background of their staff.
Endrick has played just 12 minutes of competitive football for Real Madrid this season under coach Xabi Alonso and is ready to leave midseason.
A loan move is favoured by management, though Endrick could cut ties if offered the right escape option.