In medieval Irish Christian pseudo-history, the Fir Bolg (also spelt Firbolg and Fir Bholg) are the fourth group of people to settle in Ireland. They are descended from the Muintir Nemid, an earlier group who abandoned Ireland and went to different parts of Europe. Those who went to Greece become the Fir Bolg and eventually return to the now-uninhabited Ireland. After ruling it for some time, they are overthrown by the invading Tuatha Dé Danann. Most scholars regard the tale as myth rather than history.
In the Dungeons & Dragons fantasy role-playing game, the firbolg is a giant.
The firbolg first appeared in the first edition Monster Manual II (1983) under the "giant" entry.
The firbolg appeared in the second edition in the Monstrous Compendium Volume Two (1989), and in the Monstrous Manual (1993) under the "giant" entry. The firbolg appeared as a player character race in The Complete Book of Humanoids (1993). The firbolg of the Forgotten Realms setting was detailed in Giantcraft (1995).
The firbolg appeared in the third edition Monster Manual II (2002).
The firbolg appeared in the fourth edition Monster Manual 2 (2009).
A firbolg is a reclusive giant that prefers to avoid contact with other sentient races. Amongst their own kind, they live in colonies, which are usually found in forests or caverns and watched by guard towers. Although they do farm, they prefer a more hunter-gatherer lifestyle, rather than the brigand/raider lifestyle of many other giants.