Tillie is a name that sounds like it was invented for a brown-and-white dog that knows exactly where the biscuits are kept. It's a diminutive of Matilda, with all of that name's warmth and none of the formality — and it lands in the same vintage-charming space as Tillie's neighbors Millie and Nellie.
Matilda's Pocket-Sized Version
Tillie derives from Matilda, which comes from Old German meaning "strength in battle." That etymology feels slightly at odds with the name's current personality on a pet, but the gap between origin and usage is part of what makes diminutives interesting. The human name Matilda has been climbing US charts, which keeps Tillie in a culturally current orbit even at this rank. Owners who want the formal version on the paperwork and Tillie in daily use have that option.
Sound and Warmth
TIL-ee: two syllables, the T opener gives it crispness, the double-L softens it, and the -ee landing is as warm as pet names get. Dogs respond to the -ee vowel ending reliably, and Tillie has enough consonant structure to cut through outdoor noise. Cavalier King Charles Spaniels and Cocker Spaniels carry Tillie with particular ease.
The Cottage-Core Register
Tillie fits the current cottagecore aesthetic perfectly: it sounds like a name you'd find embroidered on a sampler or painted on a farmhouse sign. For owners drawn to that world — linen, wildflowers, dogs that run through fields — Tillie is a coherent choice.