An interesting blog about "La Belle Otero":
The Suicide Siren: La Belle Otero
"...Eight men killed themselves for her ..... For her 30th birthday, five monarch-lovers (Prince Albert of Monaco, King Leopold of Belgium, Prince Nicholas I of Montenegro, Grand Duke Nikolai Nikolaevich, and Edward, Prince of Wales) chipped in and threw her a gala surprise party at Maxim's..."
Also a ref to a book named "La Belle Otero" by Arthur Lewis.... I'll try and get it from the library :-)