 In September 2004, McNamara wed Diana Masieri Byfield, an Italian-born widow who had lived in the United States for more than 40 years.It was her second marriage.She was married for more than three decades to Ernest Byfield, a former OSS officer and Chicago hotel heir whose mother, Gladys Tartiere, leased her 400-acre (1.6 km²) Glen Ora estate in Middleburg, Virginia, to John F. Kennedy during his presidency.