Gram was one of the earliest legendary Danish kings

Legendary Danish kings

The legendary kings of Denmark are the predecessors of Gorm the Old, half history and half legend. The accounts of the Danish kings are confusing and contradictory, and so this presentation tries to separate the various sources from each other...

 according to Saxo Grammaticus

Saxo Grammaticus

Saxo Grammaticus also known as Saxo cognomine Longus was a Danish historian, thought to have been a secular clerk or secretary to Absalon, Archbishop of Lund, foremost advisor to Valdemar I of Denmark. He is the author of the first full history of Denmark.- Life :The Jutland Chronicle gives...

' Gesta Danorum

Gesta Danorum

Gesta Danorum is a patriotic work of Danish history, by the 12th century author Saxo Grammaticus . It is the most ambitious literary undertaking of medieval Denmark and is an essential source for the nation's early history...

. His history is given in more detail than those of his predecessors. Georges Dumézil

Georges Dumézil

Georges Dumézil was a French comparative philologist best known for his analysis of sovereignty and power in Proto-Indo-European religion and society...

 argued that Gram was partially modelled on the god Thor

Thor

In Norse mythology, Thor is a hammer-wielding god associated with thunder, lightning, storms, oak trees, strength, the protection of mankind, and also hallowing, healing, and fertility...

, in particular his defeat of Hrungnir

Hrungnir

Hrungnir was a jötunn in Norse mythology, slain by the god Thor with his hammer Mjölnir. The account is documented in the Skáldskaparmál, in the Prose Edda by Snorri Sturluson....

 and subsequent encounter with Gróa

Gróa

In Norse mythology, Gróa is a völva and practitioner of seiðr, the wife of Aurvandil the Bold.-Prose Edda:Gróa appears in the Prose Edda book Skáldskaparmál, in the context of Thor's battle with the jötunn Hrungnir...

.

The Old Norse word gramr means "king" and is probably the source of Gram's name, possibly through a misunderstanding of Saxo's. No other ancient source mentions a king named Gram.