Question: Seimas ("Sejm", "Sojm", Belarusian: Сойм ) was an early parliament in the Grand Duchy of Lithuania, The Union of Lublin created a new state, the Polish–Lithuanian Commonwealth, and joined the Seimas of Lithuania with Sejm of Poland into one organization, the bicameral parliament of the Polish–Lithuanian Commonwealth is officially titled what?

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Radziwiłł family: The Radziwiłł family (] ; Lithuanian: "Radvila" ; Belarusian: Радзівіл, Radzivił ; German: "Radziwill" ) was a powerful magnate family originating from the Grand Duchy of Lithuania and later the Crown of the Kingdom of Poland.  The descendants of Kristinas Astikas, a Lithuanian and a close associate of the 14th century Lithuanian ruler Vytautas, were highly prominent for centuries, first in the Grand Duchy of Lithuania, later in the Polish–Lithuanian Commonwealth and the Kingdom of Prussia.  The family has produced many individuals notable in Lithuanian, Belarusian, Polish, German (particularly Prussian) and general European history and culture.  The Radziwiłł family received the title of "Reichsfürst" (prince, Polish: "książę" , Lithuanian: "kunigaikštis" , Belarusian: князь, kniaź ), from the Holy Roman Empire.

Lipka Tatars: The Lipka Tatars (also known as Lithuanian Tatars, Polish Tatars, "Lipkowie", "Lipcani" or "Muślimi") are a group of Tatars who originally settled in the Grand Duchy of Lithuania at the beginning of the 14th century.  The first settlers tried to preserve their shamanistic religion and sought asylum amongst the non-Christian Lithuanians.  Towards the end of the 14th century, another wave of Tatars – this time, Muslims, were invited into the Grand Duchy by Vytautas the Great.  These Tatars first settled in Lithuania proper around Vilnius, Trakai, Hrodna and Kaunas and later spread to other parts of the Grand Duchy that later became part of Polish–Lithuanian Commonwealth.  These areas comprise present-day Lithuania, Belarus and Poland.  From the very beginning of their settlement in Lithuania they were known as the Lipka Tatars.  While maintaining their religion, they united their fate with that of the mainly Christian Polish–Lithuanian Commonwealth.  From the Battle of Grunwald onwards the Lipka Tatar light cavalry regiments participated in every significant military campaign of Lithuania and Poland.

Union of Lublin: The Union of Lublin (Polish: "unia lubelska" ; Lithuanian: "Liublino unija" ) was signed July 1, 1569, in Lublin, Poland, and created a single state, the Polish–Lithuanian Commonwealth.  It replaced the personal union of the Crown of the Kingdom of Poland and the Grand Duchy of Lithuania with a real union and an elective monarchy, since Sigismund II Augustus, the last of the Jagiellons, remained childless after three marriages.  In addition, the autonomy of Royal Prussia was largely abandoned.  The Duchy of Livonia, tied to Lithuania in real union since the Union of Grodno (1566), became a Polish–Lithuanian condominium.

Military of the Polish–Lithuanian Commonwealth: The military of the Polish–Lithuanian Commonwealth evolved from the merger of the armies of the Kingdom of Poland and the Grand Duchy of Lithuania following the 1569 Union of Lublin, which formed the Polish–Lithuanian Commonwealth.  The army was commanded by the Hetmans of the Polish–Lithuanian Commonwealth.  The most unique formation of the army was the heavy cavalry in the form of the Polish winged hussars.  The Polish–Lithuanian Commonwealth Navy never played a major role in the military structure, and ceased to exist in the mid-17th century.

History of Lithuania: The history of Lithuania dates back to settlements founded many thousands of years ago , but the first written record of the name for the country dates back to 1009 AD.  Lithuanians, one of the Baltic peoples, later conquered neighboring lands and established the Grand Duchy of Lithuania in the 13th century (and also a short-lived Kingdom of Lithuania).  The Grand Duchy was a successful and lasting warrior state.  It remained fiercely independent and was one of the last areas of Europe to adopt Christianity (beginning in the 14th century).  A formidable power, it became the largest state in Europe in the 15th century through the conquest of large groups of East Slavs who resided in Ruthenia.  In 1385, the Grand Duchy formed a dynastic union with Poland through the Union of Krewo.  Later, the Union of Lublin (1569) created the Polish–Lithuanian Commonwealth that lasted until 1795, when the last of the Partitions of Poland erased both Lithuania and Poland from the political map.  Afterward, the Lithuanians lived under the rule of the Russian Empire until the 20th century.

Silent Sejm: Silent Sejm (also "Dumb Sejm" and literally "Mute Sejm", Belarusian: Нямы сойм ; Polish: "Sejm Niemy" ; Lithuanian: "Nebylusis seimas" ) is the name given to the session of the Sejm (parliament) of the Polish-Lithuanian Commonwealth of 1 February 1717 held in Warsaw.  A civil war in the Commonwealth was used by the Russian Tsar Peter the Great as an opportunity to intervene as a mediator.  It marked the end of Augustus II of Poland's attempts to create an absolute monarchy in Poland, and the beginning of the Russian Empire's increasing influence and control over the Commonwealth.

Grodno Sejm: Grodno Sejm (Polish: "Sejm grodzieński" ; Belarusian: Гарадзенскі сойм ; Lithuanian: "Gardino seimas" ) was the last Sejm (session of parliament) of the Polish–Lithuanian Commonwealth.  The Grodno Sejm, held in fall of 1793 in Grodno, Grand Duchy of Lithuania (now Hrodna, Belarus) is infamous because its deputies, bribed or coerced by the Russian Empire, passed the act of Second Partition of Poland.  The Sejm started on 17 June and ended on 23 November 1793.  It ratified the division of the country in a futile attempt to prevent its subsequent complete annexation two years later in the 1795 Third Partition of Poland.

Sejm of the Kingdom of Poland: The general sejm (Polish: "sejm walny" , also translated as the full or ordinary sejm) was the parliament of Kingdom of Poland.  It had evolved from the earlier institution of "wiec".  It was one of the primary elements of the democratic governance in the Kingdom of Poland.  The sejm was a powerful political institution, and from early 16th century, the Polish king could not pass laws without the approval of that body.  The Sejm and the Seimas of the Grand Duchy of Lithuania was merged into the Sejm of the Polish–Lithuanian Commonwealth by the Union of Lublin in 1569.

Sejm of the Polish–Lithuanian Commonwealth: The general sejm (Polish: "sejm walny" , also translated as the full or ordinary sejm) was the bicameral parliament of the Polish–Lithuanian Commonwealth.  It was established by the Union of Lublin in 1569 from the merger of the Sejm of the Kingdom of Poland and the Seimas of Grand Duchy of Lithuania, Ruthenia and Samogitia.  It was one of the primary elements of the democratic governance in the Commonwealth (see Golden Liberty).  The sejm was a powerful political institution and the king could not pass laws without the approval of that body.

Seimas of the Grand Duchy of Lithuania: Seimas ("Sejm", "Sojm", Belarusian: Сойм ) was an early parliament in the Grand Duchy of Lithuania.  It was active from 1445 to 1569, when it was officially abolished by the Union of Lublin.  The Seimas was an irregular gathering of the Lithuanian nobility, called as needed by the Grand Duke or during an interregnum by the Lithuanian Council of Lords (an early government).  The meetings would usually last one or two weeks.  Seimas gradually evolved from a meeting of the most powerful magnates to a full legislative institution representing all of the nobility.  The Seimas was not the main political player as it was overshadowed by the Council of Lords.  The Union of Lublin created a new state, the Polish–Lithuanian Commonwealth, and joined the Seimas of Lithuania with Sejm of Poland into one Sejm of the Polish–Lithuanian Commonwealth.  However, the Seimas continued to convene under the name of Lithuanian Convocation.  In total there were 40 Seimas and 37 Convocations.

Supporting paragraphs: Seimas of the Grand Duchy of Lithuania Sejm of the Polish–Lithuanian Commonwealth
Answer: Sejm of the Polish–Lithuanian Commonwealth