The Grogoch (also spelled gruagach or phynnodderee) is a hairy, solitary creature from Irish, Scottish, and Manx folklore that is a type of household spirit or brownie. It is known as a "ragged hearth-helper" because it often appears naked or in rags and performs household or farm chores for human families, typically at night by the fireside (hearth).

Description
- Appearance: The Grogoch is usually described as a small, elderly man, around 3 to 3.5 feet tall, covered in coarse, dense reddish hair or fur, and wearing no clothes other than a collection of twigs and dirt from its travels. In other tales, it is an ape-like creature around seven feet tall.
- Habitat: It usually lives in remote areas, such as caves, hollow trees, or clefts in the landscape, but may attach itself to a specific household.
- Behaviour: Grogochs are generally helpful, performing tasks like planting, harvesting, mowing, mending fishing nets, or doing domestic chores while the household sleeps. They are impervious to heat and cold and can be invisible.
Interactions with Humans
- Payment: The Grogoch works for free, but traditionally, the woman of the house would leave a bowl of cream, milk, or ale by the hearth as an offering.
- Offense: The creature is easily offended and will abandon a home forever if it feels insulted or is given a gift of new clothing (which it perceives as payment rather than an offering).
- Clergy: Grogochs have a great fear of the clergy and will not enter a house if a priest or minister is present. This is sometimes used as a way to drive them off if they become a nuisance.
- Temperament: While usually helpful, if angered or mistreated, they can turn malicious or mischievous, becoming similar to a boggart.
The Grogoch is a fascinating part of Irish and Celtic folklore, embodying the wilder, untamed aspects of nature and the complex relationship between humans and the supernatural world.