Is there an Autumn equivalent of the Winter spirit Jack Frost?

Yes, an Autumn equivalent to Jack Frost is often considered to be the character known as "Autumn" or "the Autumn Spirit," which personifies the season's transformation and harvest themes. In various folklore, this spirit might embody the changing colors of leaves, the crisp air, and the preparation for winter, celebrating the bounty of nature. While not as universally recognized as Jack Frost, this spirit captures the essence of autumn through themes of change, gratitude, and the beauty of decay.