Diminutive possibly from Penelope or Pelagia; informal pet form of uncertain origin.
Pellie is a diminutive possibly from Penelope or Pelagia, though its origin is uncertain. That uncertainty gives the name a pet-name quality, as if it has floated free from a longer form and become affectionate and independent in its own right.
The sound is soft, old-fashioned, and intimate. Pellie feels small in the best sense: endearing, approachable, and slightly antique. It does not insist on fixed lineage, which lets it live comfortably as a nickname-like given name. Pellie sounds gentle, unforced, and quietly memorable.