People Unknown Magennis Unknown Magennis Unknown Magennis from . About Family Partner Felim O'Neill Of Kinard Children He has four children, Arthur , Rose , Catherine and Catherine . Other facts about Unknown Magennis Given name T1674120370 Unknown Magennis' Children (4) Arthur Magennis, 1st Viscount Magennis Of Iveagh Rose Guinness Catherine O'Neill, Countess Of Tyrone Catherine Magennis Comments There are no comments yet. Enter your name here: Enter your email here: Enter your message here: Your message is required. Markdown cheatsheet. Submit