According to E. De Felice, the surname Biancardi and related forms such as Biancardo and Bianciardo derive from the medieval personal name Biancardo or Bianciardo, which is linked to the Germanic forms Blankhard and the French Blancard or Blanchard. These names are composed of the Germanic element blank (“white”) and hardhu, meaning “strong,” “brave,” or “illustrious.”

F. De Laurentiis agrees with this interpretation and notes that the surname originated from medieval Germanic names transmitted through the French tradition. He explains that the element blank (“white”) was combined with the suffix -ardo, which became a common derivational element in Italian, reinforcing the surname’s anthroponymic origin.

E. Rossoni likewise traces the surname to the Germanic Blankhard or the French Blanchard. He notes that Biancardi is found throughout Italy, particularly in northern regions and Campania, with significant concentrations in the areas of Milan and Naples. The variant Biancardo is much less common and is mainly found in the provinces of Naples and Avellino.

Taken together, the authors agree that Biancardi is a surname of medieval Germanic origin, introduced and shaped through French influence before becoming established in Italy.