From ChatGPT :
Paracelsus, a Swiss physician and alchemist from the 16th century, was known for his concept of “elementals,” which were thought to be spirits or entities that dwelled in the natural world and were associated with the four elements of earth, air, fire, and water. Paracelsus believed that elementals could be harnessed and used for various purposes, such as healing and divination.
According to Paracelsus, elementals were divided into four categories, each corresponding to one of the elements. These categories were known as gnomes (earth), undines (water), sylphs (air), and salamanders (fire).
Gnomes were said to be small, earth-dwelling creatures that were associated with the mineral kingdom and had the power to heal and protect.
Undines were believed to be water nymphs that were associated with the world of emotions and were said to possess the power of healing and transformation.
Sylphs were thought to be airy spirits that were associated with the realm of the mind and were believed to possess the power of communication and mental clarity.
Finally, salamanders were believed to be fiery spirits that were associated with the world of energy and passion and were thought to possess the power of transformation and creativity.
Overall, Paracelsus’ concept of elementals was influential in the development of various occult and esoteric traditions, and it continues to be a source of inspiration for many practitioners today.