Mary IV, full name: Mary Alexandra Theodora Irene; born 12 May 1943) is the Queen regnant of Sconemark. As the eldest child of King Christian IX and Irene of Diadochia, she succeeded her father upon his death on 18 January 1975. On her accession, she became the fourth female monarch of Sconemark, she is also coincidentally the fourth female monarch of Sconemark to be named Mary.