Gunther is a Germanic name from Gundahar — combining gund (battle) and heri (army) — that's best known in American pop culture as the coffee shop manager on Friends who spent ten years pining quietly for Rachel Green. That secondary-character longing gives the name an underdog warmth that transfers rather well to the right kind of dog.
The Friends Effect
Gunther from Friends (played by James Michael Tyler across all ten seasons) is one of television's great unrequited-love side characters. He's dependable, present, and quietly devoted — qualities that map onto dogs rather precisely. Owners who name their dog Gunther are usually making a conscious nod to this, and the name comes with a ready-made joke for every social interaction: "Does he know Rachel doesn't love him back?"
Germanic Gravitas
Before Friends, Gunther was a medieval Germanic warrior name appearing in the Nibelungenlied and other Norse-Germanic texts. That historical dimension gives the name real depth for owners interested in Germanic heritage. German shepherds, Rottweilers, and Great Danes wear the name with particular authority — a large German breed named Gunther has both the pop culture layer and the geographic authenticity.
Sound Architecture
Gunther is two syllables with a hard G opening and a soft -ther ending. It carries well outdoors, shortens to Gun (though most owners avoid that), and has a distinctive enough sound that it rarely gets confused with other names or commands. The human name context at Gunther shows its broader Germanic usage.