His great - grandchildren include author Frances FitzGerald , model Penelope Tree , and actress Kyra Sedgwick .
Massachusetts Governor Endicott Peabody was his grandson .
Endicott Peabody 's great - grandchildren include author Frances FitzGerald , model Penelope Tree , and actress Kyra Sedgwick .
Massachusetts Governor Endicott Peabody was his grandson .