Wallie is a variant spelling of Wally — a diminutive of Walter meaning "ruler of the army," and its 30 registry records sit in the affectionate, slightly goofy nickname territory that pet owners love. It has the built-in warmth of a name that sounds like it's already been loved before you even pick it.
The Wally Energy
Wally/Wallie has a specific personality type attached to it: amiable, a little dopey, fundamentally good-natured. Where Walter reads as dignified, Wallie reads as the golden retriever of names — enthusiastic and impossible to dislike. Golden retrievers and Labrador retrievers suit it almost too well.
The WALL-E Factor
Pixar's 2008 film WALL-E introduced the phonetic twin of this name to a generation of children who are now in peak pet-owning years. The film's robot protagonist is earnest, hardworking, and adorable, with traits that transfer favorably to any animal bearing a similar name. The human name Walter itself has staged a strong comeback in the past decade.
The Counter-Reading: The -ie Spelling Question
Wallie with -ie reads slightly more feminine than Wally, though both spellings are used for male pets. If you're naming a male dog, Wally is the more common form — Wallie invites occasional gender confusion on paperwork. Browse playful options at pet names.