Snorri Sturluson's Ynglinga saga relates of King Dygvi of Sweden:
Dygvi's mother was Drótt, a daughter of King Danp, the son of Ríg, who was first called konungr in the Danish tongue . His descendants always afterwards considered the title of konungr the title of highest dignity. Dygvi was the first of his family to be called konungr, for his predecessors had been called dróttinn, and their wives dróttning, and their court drótt . Each of their race was called Yngvi, or Ynguni, and the whole race together Ynglingar. Queen Drótt was a sister of King Dan Mikilláti, from whom Denmark took its name.
Here Ríg is father of Danp the father of Dan. The title Mikilláti can be translated 'Magnificent' or 'Proud'.
Snorri does not relate here whether this Dan is also descended from King Fridfrodi or Peace-Fróði whom Snorri presented as ruling in Zealand as a contemporary of Fjölnir son of Frey six generations before King Dygvi. Snorri writes further:
In the time when the kings we have been speaking of were in Uppsala, Denmark had been ruled over by Dan Mikilláti, who lived to a very great age; then by his son, Fróði Mikilláti, or the Peace-loving, who was succeeded by his sons Halfdan and Fridleif, who were great warriors.
This peaceful Fróði seems a duplicate of the earlier Fróði.
In his preface to the Heimskringla (which includes the Ynglinga saga), Snorri writes:
The Age of Cairns began properly in Denmark after Dan Mikilláti had raised for himself a burial cairn, and ordered that he should be buried in it on his death, with his royal ornaments and armour, his horse and saddle-furniture, and other valuable goods; and many of his descendants followed his example. But the burning of the dead continued, long after that time, to be the custom of the Swedes and Northmen.
Read more about this topic: Dan (king)