Hrothgar, also rendered Hrōðgār, is an Old English form attested in Beowulf and Widsith, the earliest sources to mention the character. In non-English sources, the name appears in more or less corresponding Old Icelandic, Old Danish, and Latinized versions. He appears as
Hróarr, Hroar, etc., in sagas and poetry, and as Ro or Roe in the Danish Latin chronicles. The form Hrōðgār is thought to have derived from the proto-Norse *Hrōþigaizaz[3] "famous spear", i.e. Roger. However, the corresponding Old Norse name Hróarr and its variations are not derived from *Hrōþigaizaz, but from the very close names *Hrōþiwarjaz "famous defender" or *Hrōþiharjaz "famous warrior". These two names, both appearing as
Hróarr in Scandinavia, did not have any corresponding Old English form, and so Hrōðgār was their closest equivalent.[4]