Jazzie — a diminutive of Jazz, Jasmine, or Jasper, depending on the owner — has that informal, affectionate quality that makes it feel like it arrived through the naming process organically: the pet was called Jazz, then Jazzie, and it stuck. It's playful, slightly musical, and impossible to say flatly. The "ie" ending does a lot of emotional work.
The Musical Association
Jazz as a music genre carries associations of improvisation, cool, and creative independence: qualities that translate well to a pet with charismatic unpredictability. Jazzie softens that into something more cuddly without losing the music thread. Cocker Spaniels with their bouncy, musical energy are natural Jazzies. Compare with Jazz for the more stripped-back version.
The Jasmine Diminutive Route
If the owner started from Jasmine, Jazzie is the affectionate shortening, going Jasmine to Jazz to Jazzie over the first few weeks of ownership. This is a completely normal naming arc for pets. The human name Jasmine carries its own Disney and botanical resonance. Browse playful female pet names at pet names.
The Counter-Reading: Spelling Variants
Jazzie, Jazzy, Jazzee — all three spellings appear in registries. The choice signals slightly different owner aesthetics (the "ie" ending is warmer and more old-fashioned than the "y" ending), but to the pet, it's completely irrelevant.