More, from New York's newspaper of record:

A picture caption yesterday with the obituary of the Tammany Hall leader Carmine G. De Sapio misstated the given name of a former New York mayor shown at a formal dinner in 1950 with him and Frank S. Hogan, the Manhattan district attorney. The mayor was William O'Dwyer; Paul was his brother, a politically active lawyer. The article also referred erroneously to Franklin D. Roosevelt Jr., whom Mr. De Sapio persuaded to abandon a run for governor in 1954. Roosevelt was the third son of the former president, not the eldest.

"Paul" wasn't just a "politically active lawyer." He eventually became New York City Council President and was a major force in city politics for years - well into the 1970s.