Caractacus Burke

Caractacus Burke is one of the original founders of Borgin and Burkes. Caractacus was one of the few people Albus Dumbledore interviewed to find out more about Voldemort's past. Dumbledore learned from Caractacus' memory that Merope Gaunt came to him, and sold the locket Horcrux for ten Galleons, not realising it was a priceless item.

Caractacus was also the one who hired Tom Riddle after he had left Hogwarts to research and collect items for him. It took him completely by surprise when Tom Riddle disappeared.

What ultimately happened to Burke is unknown, but by 1992, the shop seemed to be exclusively operated by Mr. Borgin.

Etymology
Caractacus is the Latin version of the old Welsh name Caradog, meaning '"beloved". In Arthurian legend, Caradog was one of the Knights of the Round Table and may correspond to the historical Caratacus, the chieftain of the Catuvellauni tribe and a leader of the British resistance to Roman conquest.

Behind the scenes
Caractacus is possibly related to Herbert Burke and other members of the pure-blood Burke family.