Given the following context:

Lucie Manette and her servant and companion Miss Pross (Edna May Oliver) are informed by banker Mr. Jarvis Lorry that her father, Dr. Alexandre Mannette is not dead, but has been a prisoner in the Bastille for eighteen years before finally being rescued. She travels with Mr. Lorry to Paris to take her father to her home in England. Dr. Manette has been cared for by a former servant, Ernest Defarge, and his wife. The old man's mind has given way during his long ordeal, but Lucie's tender care begins to restore his sanity.
On the return trip across the English Channel, Lucie meets Charles Darnay, a French aristocrat who, unlike his tyrannical uncle, the Marquis de St. Evremonde, is sympathetic to the plight of the oppressed and impoverished French masses. He has denounced his uncle, relinquished his title and going to England to begin a new life. The vindictive Marquis has Darnay framed for treason, but he is saved by the highly proficient but cynical lawyer Sydney Carton. Carton goes drinking with Barsad, the main prosecution witness, and tricks him into admitting that he lied. When Barsad is called to testify, he is horrified to discover that Carton is one of the defense attorneys, and suddenly realizes that his testimony was wrong. Darnay is acquitted.
Carton is thanked by Lucie, who had been a witness at the trial. He quickly falls in love with her, but comes to realize that it is hopeless. Carton is jealous of Darnay and the obvious attraction Darnay and lucie have for each other. Nevertheless, Carton and Lucie become close friends. Lucie and Darnay are eventually married and they have a daughter, also named Lucie.

answer the following question:

What was the full name of the person Charles denounced? 

Marquis de St. Evremonde