The Gesta Danorum (Books I-IX) on Westmar
The Danish History, > Book Five.
attestation: Westmar and Koll were chosen as Frode's foster-fathers
"the brothers Westmar and Koll were summoned to the charge of bringing up the king"
attestation: Westmar fathered twelve sons, three of whom were triplets all named Grep
"Westmar had twelve sons, three of whom had the same name--Grep in common. These three men were conceived at once and delivered at one birth"
attestation: Westmar and Koll and their sons were appointed to accompany Gotwar on the marriage embassy
"Frode also ordered that Westmar and Koll, with their sons, should be summoned to go on the same embassy"
attestation: Westmar threatened the King of the Huns with violence if the marriage proposal was refused
"Now thou must needs either consent to our entreaties, or meet in battle us who entreat thee. We would rather die nobly than go back with our mission unperformed"
attestation: Westmar challenged Erik to a physical wrestling contest with death as the stakes for the loser
"Westmar, when he saw this, determined to attack the man by force, since he was the stronger of tongue, and laid down the condition that the reward of the conqueror should be the death of the conquered"