Maurice Tempelsman, the Belgian-American diamond magnate who drew news media scrutiny as Jacqueline Kennedy Onassis’ companion for more than a decade before her death in 1994, died on August 23 in Manhattan. He was 95.

Mr. Tempelsman became Mrs. Onassis’ financial advisor and, in time, was reported to have quadrupled her $26 million inheritance from Mr. Onassis. Within a few years, they were being seen together at private dinners, consular affairs, the ballet and the opera.

To the general public, Mr. Templesman was best known as the final companion of Mrs. Onassis. As she was dying of cancer, he was identified as the concerned-looking man in news photographs accompanying her on walks in Central Park, steadying her. He was at her bedside when she died at 64 in May 1994, and stood with her children at her funeral in New York and at her burial in Arlington National Cemetery.