Dugmaren Brightmantle

Dugmaren Brightmantle is a deity of the Dwarven and Gnomish pantheon, also known as The Errant Explorer, or Glam Na Súl (The Gleam In The Eye). Gurney Toughtoe is a follower and Cleric of Brightmantle.

Official 5e Lore

Dugmaren Brightmantle (DUHG-mah-ren BRITE-man-tuhl) is the patron of dwarven scholars and the embodiment of the chaotic and exploratory spirit that consumes some of the Stout Folk. He is venerated by dwarves and a few gnomes, all of whom are scholars, inventors, engineers, tinkers, and fiddlers. His worshipers are consumed with the acquiring of knowledge simply for its own sake rather than for any practical purpose. Whereas Moradin draws smiths and other craftsfolk to his forge, Dugmaren attracts those free-thinkers who want to create something truly new, not a variation on an old theme.
Dugmaren is thought to be a child of Moradin - a chaotic element split off from his father's stern lawfulness and nurtured by the favor of his mother Berronar. In fact the All-Father relates well to Dugmaren's creative and explorative instincts, but the Wandering Tinker often drifts away from projects before they are completed and usually before he has found a use for the knowledge he has gathered - a trait that irritates Moradin to no end. Dugmaren is always getting himself enmeshed in one exploit or another, and his regular accomplices include Haela or Marthammor of the Morndinsamman and Brandobaris, Erevan Ilesere, Nebelun/Gond, or Shaundakul from the other human or demihuman pantheons. Aside from Gargauth, who embodies everything corruptive and malevolent in the discovery of lost or undiscovered knowledge, the gods of the Illithids, who seek to hoard knowledge for themselves, and Urdlen, who hates everyone and everything, the Wandering Tinker has no true foes. However, Dugmaren finds the company of Abbathor, Deep Duerra, Laduguer, and the goblin and evil giant gods trying at best. The Wandering Tinker is tolerated by the lawful members of the dwarven pantheon because his inventions and innovations have proven to have had beneficial aspects.
Dugmaren is a benign, inquisitive, cheerful, and optimistic deity concerned with discovering the unknown. He is an inveterate acquirer of trivia and little-used knowledge, an experimenter and a fiddler. Although he dwells within the Dwarvish Mountain in the Outlands, he often ventures into the planes of Arborea, Elysium, and Bytopia. The Wandering Tinker sometimes dispatches an avatar to act as an unseen guide for dwarven scholars and travelers, protecting them in their searches and providing hints on where to look for knowledge.