Italy

The monarchy of Italy (Italian: Monarchia italiana) was the system of government in which a hereditary monarch was the sovereign of the Kingdom of Italy from 1861 to 1946

H.M. King Victor Emmanuel III of Italy 1869-1947,

reign 1900-1946

married 1896 to
H.M. Queen Elena of Italy (née Princess of Montenegro)

1873-1972

5 children, including

↓

Last King of Italy

H.M. King Umberto II of Italy

1904-1983, reign 9 May 1946 – 12 June 1946

married 8 January to
H.M. Queen Marie-José of Italy (née Princess of Belgium)

1906-2001

4 children, including

↓

 H.R.H. Prince Vittorio Emanuele of Savoy, Prince of Naples

1937 - 2024

married 1971 to

H.R.H. Marina Ricolfi-Doria, Princess of Naples, Duchess of Savoy

born 1935

one son
↓

Current pretender:

Head of the House of Savoy
H.R.H. Prince Emanuele Philliberto of Savoy, Prince of Naples
born 1972
married 2003 to

Princess Clotilde of Savoy (née Clotilde Marie Pascale Courau)
born 1969 

Bulgaria

The Tsardom of Bulgaria also referred to as the Third Bulgarian Tsardom was a constitutional monarchy in Eastern and Southeastern Europe untill 1946

H.M. Tsar Ferdinand I of Bulgaria

1861-1948, reign 1908-1918

married

H.M. Tsarisa Eleonore of Bulgaris, (née Princess of Reuss-Köstritz)
1860-1917

4 children, including

↓

H.M. Tsar Boris III of Bulgaria 1894-1943,

reign 1898-1943

married 25 October 1930 to
H.M. Giovanna, Tsaritsa consort of Bulgaria, (née Princess of Italy)

1907-2001

2 children, including

↓

Last King of Bulgaria

H.M. King/Tsar Simeon II of Bulgaria born 1937,

reign 1943-1946

married 21 January 1962 to

H.M. Margarita Gómez-Acebo y Cejuela
born 1935

Montenegro

The Kingdom of Montenegro  was a monarchy in southeastern Europe, present-day Montenegro, during the tumultuous years on the Balkan Peninsula leading up to and during World War I

Last King of Montenegro

H.M. King Nicholas I of Montenegro

1841-1921, reign 1910-1918

married 8 November 1862 to

H.M. Milena, Queen Consort of Montenegro (née Petrović-Njegoš)

1848-1923

Nikola I's heir at death was his eldest son, Crown Prince Danilo (titular King Danilo II), who "abdicated" after one week, recognising his cousin's reign over Serbia (including the territories of Montenegro) and Yugoslavia. Family's dynastic claim was taken up by his grandson, Michael, Prince of Montenegro, the titular King Mihajlo I, who was the father of Prince Nikolas and died in exile in 1986.

Current pretender:

Head of the House of Petrović-Njegoš

H.R.H. Crown Prince Nicholas of Montenegro
born 1944

Albania

The Albanian Kingdom was the official name of Albania between 1928 and 1939. Albania was declared a monarchy by the Constituent Assembly, and President Ahmet Bej Zogu was declared King Zog I.

Last King of Albania

H.M. King Zog I of Albania

1895-1961, reign 1928-1939

married 27 April 1938 to
H.M. Geraldine, Queen Consort of Albania, (née Apponyi de Nagy-Appony)

1915-2002

grandson ↓

Current pretender:

Head of the house of Zogu

H.R.H. Leka II, Crown Prince of Albania born 1982

married 8 October 2016 to

H.R.H. Elia, Crown Princess of Albania (née Zaharia) born 1983

Russia

Nicholas II or Nikolai II Alexandrovich Romanov(18 May 1868 – 17 July 1918), known in the Russian Orthodox Church as Saint Nicholas the Passion-Bearer, was the last Tsar of All Russia, ruling from November 1894 until his abdication in March 1917

Last Tsar of Russia
H.I.M. Tsar Nicolas II
1868-1918, reign 1894-1917

Since 1992, the most widely acknowledged pretender is Maria Vladimirovna, Grand Duchess of Russia ,a great-great-granddaughter in the male-line of Emperor Alexander II of Russia, having proclaimed herself the head of the imperial house upon her father's death.^[She also declared her son George Mikhailovich (born 1981) to be the heir-apparent.

Current pretender:

H.I.H. Grand Duchess Maria Vladimirovna of Russia 
born 1953
married 1976-1985 to
Prince Franz Wilhelm of Prussia
born 1943