Which Cartier brother managed the London branch?

Jacques Cartier managed Cartier’s London branch. He was one of Alfred Cartier’s three sons, alongside Louis and Pierre, who transformed their father’s Paris jewelry business into an international luxury house.

Cartier opened its first London premises at 4 New Burlington Street in 1902. Pierre initially managed that branch, but Jacques took charge of the London operation in 1909 and later moved it to 175 New Bond Street. He remained closely associated with Cartier London until his death in 1941.

The brothers divided the family enterprise geographically: Louis led the Paris branch and shaped Cartier’s signature design language, Pierre developed the New York business, and Jacques cultivated the London clientele. His work brought the house close to British royalty and aristocratic patrons.

A common mix-up is Pierre Cartier, because he opened the London branch before moving to New York. The question asks who managed London during its established long-term operation, making Jacques the canonical answer.