Wedding Favours: Cats in the Window

I recently had the pleasure of creating a design for wedding favour cookies featuring the bride and groom's two cats. The design needed to include both cats, and room for names and date.

Groom on a heart cookie tutorial

This is a classic design for brides and grooms using heart shaped cookies for wedding favours. It's not original, it's not complicated, it's perfect for the occasion, and it's easy enough to make in large numbers. This is why I've always thought it's one of the cleverest ideas around. Does anyone know where it orginated? Would it even be possible to find out now?