A woman who identified herself as the wife of son David Wiener asked for privacy "at this time of grief".
Contacted by phone, she said: "We are not making any comment at this time."
Madoff was infamously known for orchestrating a massive Ponzi scheme that wiped out people's fortunes and ruined charities. He was sentenced to 150 years in prison after pleading guilty in 2009 to fraud and other charges and died while incarcerated at age 82 last year.
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- AP