Board Thread:Skyrim/@comment-119.94.16.246-20150627131932/@comment-25356303-20160131152515

Like Azura mentioned, you can overhear Hadvar ordering Gunnar to get Haming to safety after the attack in Helgen, so they're the same person according to the story. However the copy in Helgen has different IDs from the one in Froki's Shack.