Это два разных неха.

Ogden, Bob Ministry of Magic

A "short, plump man" who worked for the Department of Magical Law Enforcement (HBP10). Ogden wore glasses so thick that they made his eyes look like specks. Dumbledore interviewed Ogden during his search for information about Tom Riddle's family; Ogden had visited the Gaunt house to follow up after Morfin Gaunt attacked Muggle Tom Riddle, and there been attacked himself (HBP10).

Ogden, Tiberius Ministry of Magic

Wizengamot elder who resigned in protest when Fudge appointed Dolores Umbridge as the first Hogwarts High Inquisitor (OP15); friend of Professor Tofty of the Wizarding Examinations Authority (OP31).

Один хрен они все сидят в министерстве, так что мог и родственник какой седьмой воды быть, не суть.