That's a Greenlander and those are Eskimo traditions, only jokingly called Danish.>Geats
Okay, I'm going to have to explain some stuff now; it doesn't go back to the initial ethnogenesis of the Goths, but to that of the Danes:
Those are the people in-between Skåne and Svealand in the North Sea coast, and they're descendants of the Goths. So Skåne is as Danish as Sjælland is, though the northwestern parts are indeed more Gothic or Swedish than Danish. Meanwhile Bornholm is actually Burgundaholm, so they're Burgundians, and I suspect that the region of Kalmar is where the Lombards (or Langobards) originally came from.
Danes claim descent from king Dan (whom Saxo Grammaticus mentions), like how Scots claim descent from Scotia, or how Romans claim descent from Romulus. Dan had a brother named Angul who would later found the Angles in southern Schleswig, these would later become the English and the North Frisians. It's a known Danish territory as well, as the old capital Hedeby was located there (which is now part of southern Schleswig, which thus means that southern Schleswig is still rightfully Danish). Then there are the Jutes (Jyder/Jyskere which apparently also means "you shit" in Frisian) and the Cimbrians, said to be unrelated. It's known that the Cimbrians were Celtic-speaking and that their root lies in the Cimmerians (and many subsets of the Danes are said to be Celtic in origin as well). Jutes meanwhile, nobody really knows. Some less educated people say they're really jews, but the word is actually another word for giant, which also sometimes means jews? Anyways, they've been linked to the Eudoses, Eotenas, Eucii, and Euthiones, apparently more Saxon tribes, and likely the "Teutones" that the Romans had to deal with. More likely than not, the Cheruscii as well as all of these northwestern German tribes that aren't Frisians or Franks are all subsets of the Saxons. In the islands there were a tribe called the Herulii who later migrated into Rome, and then the Huns came, the Danes helped them, they got beaten to hell anyways.
Anyways, the Schleswig region was both "Anglish" and Danish, whereas Skåne was more-so Danish than Gothic. It's said that the Danes of Jylland/Fyn (not the north Frisians who are Angles or the Germans there who are Jutes) are "southern Danes" whereas the ones of Sjælland and Skåne are "northern Danes". What to say, since maps were displayed differently back then? And of course, the Dacians and Danes were conflated. Dacia (see Jacabo Daciano) is said to be a combination of "Dania" and "Suecia" (Sweden) used by the Latin church, but then again, in Russian, the word for Danish is "Datskiy", but in older Russian (I'm talking before Peter I messed everything up), Danish was "Dakskiy", meaning to the Orthodox Russians Danes were actually Dacians.
Also, some trivia: the old royal Danish title was "King of Danes, Goths and Wends". Goths inhabited parts of Skåne, and the Wends were subject of the Danes via the old continental holdings. Wolin, Poland was Jomsborg in medieval times, which was where ethnically Wendish but Norse-speaking mercenaries came from, and the Duchy of Pomerania was formerly under Danish control.