Country: Belgium
Current Sovereign: King Philippe, 54
(since July 21, 2013)
Royal Family: House of Belgium
Succession: Oldest male or female
(absolute primogeniture)
Heir: Princess Elisabeth, 12

Country: Denmark
Current Sovereign: Queen Margrethe II, 74
(since January 14, 1972)
Royal Family: House of Oldenburg
Succession: Oldest male or female
(absolute primogeniture)
Heir: Crown Prince Frederik, 46

Country: Liechtenstein
Current Sovereign: Prince Hans-Adam II, 69
(since November 13, 1989)
Royal Family: House of Liechtenstein
Succession: Oldest male
(agnatic primogeniture)
Heir: Prince Alois, 46

Country: Luxembourg
Current Sovereign: Grand Duke Henri, 59
(since October 7, 2000)
Royal Family: Second House of Nassau
Succession: Oldest male or female
(absolute primogeniture)
Heir: Grand Duke Guillaume, 32

Country: Norway
Current Sovereign: King Harald V, 77
(since January 17, 1991)
Royal Family: House of Oldenburg
Succession: Oldest male or female
(absolute primogeniture, enforced in 1990, and applies only to the grandchildren of King Harald V)
Heir: Crown Prince Haakon Magnus, 40
(King Harald V's children still follow the male-preferred succession)

Country: Sweden
Current Sovereign: King Carl XVI Gustaf, 68
(since September 15, 1973)
Royal Family: House of Bernadotte
Succession: Oldest male or female
(absolute primogeniture)
Heir: Crown Princess Victoria, 36

Country: Monaco
Current Sovereign: Prince Albert II, 56
(since April 6, 2005)
Royal Family: House of Grimaldi
Succession: Oldest male (then oldest female only if there are no more males left to succeed)
(male-preference cognatic primogeniture)
Heir: Princess Caroline, 57
(eldest sister; presumptive heir, pending the announced birth of a child to Albert and his wife Charlene towards the end of 2014)

Country: Spain
Current Sovereign: King Felipe VI, 46
(since June 19, 2014)
Royal Family: House of Bourbon
Succession: Oldest male (then oldest female only if there are no more males left to succeed)
(male-preference cognatic primogeniture*)
Heir: Princess Leonor, 8
(heir apparent, unless her parents have a son)

Country: Netherlands
Current Sovereign: King Willem-Alexander, 47
(since April 30, 2013)
Royal Family: House of Orange-Nassau
Succession: Oldest male or female
(absolute primogeniture)
Heir: Princess Catharina-Amalia, 10

Country: United Kingdom
Current Sovereign: Queen Elizabeth II, 88
(since February 6, 1952)
Royal Family: House of Windsor
Succession: Oldest male (then oldest female only if there are no more males left to succeed)
(male-preference cognatic primogeniture*)
Heir: Prince Charles, 65