4"Rostellan Castle/House | Housetorian." Housetorian | The Story behind the House. Web. 15 Dec. 2011. <http://gatecottages.wordpress.com/2011/04/05/rostellan-castlehouse/>.
The 5th Earl of Inchiquin Murrough O'Brien named the tower in honor of actress Sarah Siddons who apparently visited the Rostellan House. She was a British actress, a tall figure with "expressive eyes and a solemn dignity."