Joubert
A French surname usually traced to an old Germanic personal name meaning “bright or shining God.”
The #9,488 most common surname in the United States (2010 Census) — about 1 in every 90,066 Americans shares it.
Etymology
Most older surname dictionaries treat Joubert as a French form of a Germanic personal name, commonly reconstructed from elements meaning “God” and “bright/famous.” One line of explanation connects it with an older form like Gozbert or similar Germanic names, which would make the sense roughly “bright by God” or “famous by God.” Because the medieval spellings are varied, the exact starting form is not certain, but the overall Germanic personal-name origin is well established in the older literature.
History
The surname is especially French in character and is well attested in medieval and later records. English-language surname writers also grouped it with other French forms that developed from Germanic baptismal names. In modern times it is best known as a French and francophone surname, though it has spread widely through migration.
Origin
Regions
Variant spellings
Fun fact
Older surname scholars often linked Joubert with the same broad family of Germanic names that produced Geoffrey, Gobert, and related forms.
From the historical record
“Jouard, Jouand , Jouaiilt, Jouaust, Joubert. Eu voyant (lue Jouffroy est uue forme de Gode- froy par le changement de Gozfred (Goth-pacifiqne) en Josfrcd et Jof- fred (xi« siècle), nous ne serons pas surpris que Jouard puisse être une”
— Dictionnaire des noms (French surnames)