From Old French 'Bret' meaning 'a Breton,' one from Brittany in France.
Bret is a name rooted in geography and migration. It derives from the Old French and Middle English *Bret* or *Breton*, an ethnic identifier meaning "a person from Brittany" — the Celtic peninsula of northwestern France whose inhabitants, the Bretons, migrated from Britain during the fifth and sixth centuries and preserved a distinct Celtic linguistic and cultural identity. The name thus carries within it a compressed history of displacement and cultural tenacity, marking the bearer as descended from people who crossed the sea and held onto their identity against pressure to assimilate.
In the English-speaking world, Bret (and its alternate spelling Brett) rose through the nineteenth century partly on the strength of Bret Harte, the American writer who chronicled Gold Rush California with sharp wit and romantic realism. His work — stories like "The Luck of Roaring Camp" — gave the name a frontier, ruggedly individualist association that lingered well into the twentieth century. The name also carried Western cool through Brett Maverick, the charming gambler of the classic television series *Maverick*, played by James Garner.
Bret with one *t* occupies a slightly more streamlined, modern-feeling position than the two-*t* Brett, and has been associated with notable cultural figures including wrestler Bret "Hit Man" Hart and comedian Bret McKenzie of Flight of the Conchords. This spelling has a clean, no-nonsense quality that appeals to parents who want something short, recognizable, and distinctly unpretentious — a name that doesn't announce itself but simply is.