The 92 year old was the son of the former U.S. ambassador to Brazil and Peru, William Pawley.
Born in Georgia in 1920, he was 28 when he began romancing a teenage Taylor after a chance vacation meeting in Miami Beach.
The couple announced its engagement in June, 1949, but the relationship was over later that year and the actress had returned the diamond ring he had given her.
Taylor married Nicky Hilton a year later.
Pawley, Jr. died on 10 July (12), according to reports. No further details about his death have been disclosed.
More than 60 love notes went under the hammer at an RR Auction sale online over the weekend (21May11).
The late movie icon and Pawley, Jr. were engaged for less than a year and never married.
The actress died in March (11).
The Hollywood legend passed away last week (23Mar11) after losing her long battle with congestive heart disease.
Now bosses at an auction house in New Hampshire are set to cash in on the star's colourful love life - they're putting more than 60 of the screen beauty's unpublished notes under the hammer, reports Access Hollywood.
Chiefs at RR Auction bought the personal letters two years ago (09) from William Pawley, who was engaged to Taylor for several months in 1949, just before she wed Conrad Hilton, Jr.
In one of the musings, the Cleopatra actress, who was then aged 17, tells Pawley she'll "never love anyone else - period".
Taylor was known for her many marriages, walking down the aisle a total of eight times.