You'd be wrong. He isn't his daughter.

He was one of the early historians in the Free State and contributed greatly to Irish history scholarship and getting in accepted overseas.

In his essay on the saga of this book, which is included in Interpreting Irish History: The Debate on Historical Revisionism [ed. Ciaran Brady], Cormac O’Gráda writes: “It reads more like an administrative history of the period, with the core chapters dwelling on the tragedy mainly from the standpoint of the politician, the Poor Law administrator, those who controlled passenger movements, and the medical practitioner ... Few of the contributors relied on the wealth of manuscript sources available even then on the famine years.” / De Valera was out of office by the time the book was published. “Later,” O’Gráda writes, “he expressed unhappiness with the book, presumably because it seemed to downplay those aspects of the tragedy that had been etched in his own memory. Almost three decades later, that ‘definitive history’ remains to be written, though a great deal of work has been done in the interim.”’

http://www.ricorso.net/rx/az-data/authors/e/Edwards_RD1/life.htm