As with many of the Edain of the First Age, our only reference to Bereg's dates are given in volume XI of The History of Middle-earth, and may not be completely reliable. In Bereg's case, we have no date of death recorded, but instead simply a note that he 'left Beleriand' (and so also left the field of knowledge of the record keepers of the Edain).

We have no explicit interpretation of Bereg's name, but a connection with the Elvish root 'berék-' seems more than likely, especially as know for sure that this element appears in the name Bregolas (another member of the House of Bëor). That root means 'wild', and by extension 'fierce, violent, sudden', and so would fit Bereg's abandonment of his people at Estolad.