Leonard McKenzie

Leonard McKenzie was an American sailor known for being the father of Namor the Sub-Mariner. He was involved in a scientific expedition to the South Pole in 1920, where unbeknownst to the Americans an Atlantean city lay underneath the water. Explosions intended to further their scientific endeavor caused massive damage to the undersea city, and they soon recovered what they thought to be an overboard woman. She was in fact the Atlantean spy Fen; she and McKenzie fell in love and married, and Fen gave birth to Namor, an Atlantean/human hybrid. Leonard's fate since then is unknown.