What was an under tenant in Norman England?

In Norman England, an under-tenant was a person who occupied land under the authority of a lord or landowner, often paying rent or providing services in exchange for the right to use the land. This arrangement was part of the feudal system, where land was held by lords and sublet to vassals or tenants who, in turn, could have their own tenants. Under-tenants typically worked the land and contributed to the agricultural economy, while their obligations varied based on their specific agreements with their lords.