I think it's Cyril Astruc. His parents fit the job descriptions in the article: tailor and teacher.

Absolutely. Also searching for his name shows pictures that perfectly fit the physical description and Vanity Fair link in the article.

Of course, it could just be one of his many pseudonyms ;)

Bingo. "He dressed in blazers cut from blue velvet or embroidered with shimmering brocade flowers. He liked to wear a diamond-encrusted Chopard sun pendant on his partially bared chest."

https://image-uniservice.linternaute.com/image/450/105809602...