The genealogy and genetics of Sovereign Prince of Kreva, King of Ancient Balts HI&RH Juozas Koreiva have been studied for a long time.
Written sources confirm that the Koreiva are Princes (King) - ius sanguinis (by blood law), by birth law. This is confirmed by the genetic studies of Prince Juozas Koreiva carried out in the USA, Houston.
The document states that Kriva (pagan clergy) and Souvereign Prince Koreiva lived here in the Kreva (Koreiva) castle. The Germans called such Sovereign Princes Kings, German "Kionig". Prince Koreiva was the King of the ancient Balts in around the 4th to 11th centuries of our era.
In the 14th century. the ancestors of Prince Juozas Koreiva are found in the written sources of Samogitia, the Grand Duchy of Lithuania and the German Order.
Albert (Albrecht) Koreiva (Koreywo, Kareiva, Korewa), was in the inner circle of the Grand Duke of Lithuania Vytautas the Great. Albert Koreiva was an elder of Veliuona (equivalent to the status of a Duke), in 1398, together with Vytautas the Great and 16 other nobles, he signed the Treaty of Salin with the Order of the Teutonic Knights. Russian chroniclers called Koreiva a Prince. Albert's relatives took part in the baptism of Samogitia. Albert Koreiva was an elder of Medininkai (Princely status). 1410 Albertas Koreiva took part in the Battle of Grunwald, headed the Medininkai (Varniai) flag (regiment).
1413 The coat of arms of Denbno was approved during the Union of Horodles, although this coat of arms was used together with his relative, the senior Duke of Samogitian Galmin, who led the army during the Battle of Grunwald and was a thousand-man - general.
Prince Juozas Koreiva associates a lot of genetic ties with the nobles of Lithuania, Poland, Russia, Germany, Ireland, Scotland, England, Scandinavia and other countries.
Genetic studies of Prince Juozas Koreiva's haplogroup in the United States in the male line (Y-DNA) confirmed the authenticity of written historical documents and the identity of Prince Juozas Koreiva with the sovereign prince of Kreva (de facto King of Krivichi) in the male line. In addition, through the male line (Y-DNA), a genetic link and identity of Prince Juozas Koreiva with:
- Robert I (King of Scotland), King of Scotland Robert the Bruce;
- Kings of Scotland and England Stewart (King Stuart (Stewart));
- King Sommerled through genetic links with: McDonald, McDougall;
The Y-DNA test also confirms the genetic link between Duke Juozas Koreiva and:
- Princes. Vorontsov;
- Princes Babichev;
- Princes Drutsky-Sokolinsky.
- Chernigov Grand Dukes Rurik (Olgovichi from Old Russian) - a branch of the House of Rurik, descended from Prince Oleg Svyatoslavich, grandson of Yaroslav the Wise; the ruling dynasty in the Chernigov principality, Novgorod-Seversk principality: in Kiev, Galician, Pereyaslavl principalities, Novgorod land.
- Grand Duke of Lithuania Gediminas:
Great-grandmother of Prince Juozas Koreiva in the male line Joanna Mingailaitė (Ioanna Mingailo (1887-1975) is a direct descendant of the Grand Duke of Lithuania Gediminas. Russian chronicles attribute Prince Mingaila to the son of Algirdas. Algirdas (February 11, 1296 - May 24, 1377) - Grand Duke of Lithuania –1377), Prince of Vitebsk (c. 1318–1345), son of Gediminas.
In Lithuanian written sources, Mingaila is mentioned as the son of Gedgaudas, who was the son of Mantvydas. Mantvydas (born 1300 BC - February 2, 1348 or 1341 or 1343) is a Lithuanian prince, the eldest son of the Grand Duke of Lithuania Gediminas.
Genetic studies were carried out in the same way on the female (maternal) line of Prince Juozas Koreiva. The results of the study of Prince Juozas Koreiva on the line (mtDNA) (for female haplogroup T2) showed that he is a genetic (by blood) relative:
- Russian Emperor Nicholas II. Through his mother, the Danish princess Marie Sophie Frederika Dagmar (Maria Feodorovna).
Assuming all relevant pedigrees are correct, this includes all female-line descendants of his female line ancestor Barbara of Celje (1390-1451), wife of Sigismund, Holy Roman Emperor.
This includes a great number of European nobles, including George I of Great Britain and Frederick William I of Prussia (through the Electress Sophia of Hanover), Charles I of England, George III of the United Kingdom, George V of the United Kingdom, Charles X Gustav of Sweden, Gustavus Adolphus of Sweden, Maurice of Nassau, Prince of Orange, Olav V of Norway, and George I of Greece. Many European royals have been found to be of this mtDNA Haplogroup.
- Prince Nikolai Trubetskoy.
- Prince Obolensky.
- John I Albert (Polish: Jan I Olbracht; 27 December 1459 – 17 June 1501) was King of Poland (1492–1501) and Duke of Głogów (1491–1498).
- Alexander Jagiellon (Polish: Aleksander Jagiellończyk; Lithuanian: Aleksandras Jogailaitis; 5 August 1461 – 19 August 1506) of the House of Jagiellon was the Grand Duke of Lithuania and later also King of Poland.
- Sigismund I the Old (Polish: Zygmunt I Stary, Lithuanian: Žygimantas II Senasis; 1 January 1467 – 1 April 1548) was King of Poland and Grand Duke of Lithuania
Many European royals have been found to be of this T2 mtDNA Haplogroup the same as the HI&RH Juozas Koreiva.
Prince Juozas Koreiva associates a lot of genetic ties with the nobles of Lithuania, Poland, Russia, Germany, Ireland, Scotland, England, Scandinavia and with the other European Royal Houses.
The Imperial and Royal House of Koreiva has dynastic orders that are granted according to their constitutions. The honor awarded to the Imperial and Royal House of Koreiva is in line with the principles of the Fount of Honor.