Eric V, Duke of Saxe-Lauenburg
Eric V of Saxe- Lauenburg( died 1436) was a member of the House of Ascania; son of Duke Eric IV of Saxe- Lauenburg and Sophia of Brunswick- Lüneburg.
Eric V and his brother John IV jointly succeeded their father in 1412 as dukes of Saxe- Lauenburg.
After John IV had died in 1414, Eric ruled alone.
Francis Charles of Saxe-Lauenburg
Francis Charles of Saxe- Lauenburg( born: 2 May 1594; died: 30 November 1660 in Neuhaus) was a prince of Saxe- Lauenburg and a general during the Thirty Years' War.
Duke Francis Henry of Saxe-Lauenburg
Francis Henry of Saxe- Lauenburg( born: 9 April 1604; died: 26 November 1658) was a Prince of Saxe- Lauenburg
Catherine of Saxe-Lauenburg
Catherine of Saxe-Lauenburg ("Katarina" in Swedish) (24 September 1513 – 23 September 1535) was the first consort of Gustav I of Sweden and Queen of Sweden from 1531 until her death in 1535.
Eric IV, Duke of Saxe-Lauenburg
Eric IV of Saxe- Lauenburg( 1354 – 21 June 1411 or 1412) was a son of Eric II, Duke of Saxe- Lauenburg and Agnes of Holstein.
John IV, Duke of Saxe-Lauenburg
John IV of Saxe- Lauenburg( *?– 1414*) was a son of Duke Eric IV of Saxe- Lauenburg and Sophia of Brunswick- Lüneburg.
Magnus I, Duke of Saxe-Lauenburg
Magnus I of Saxe-Lauenburg (1 January 1470 – 1 August 1543) was a Duke of Saxe-Lauenburg from the House of Ascania.
Clara of Saxe-Lauenburg
Clara of Saxe- Lauenburg( December 13, 1518 – March 27, 1576) was a Princess of Saxe- Lauenburg and Duchess of Brunswick- Gifhorn by marriage.
Gustav I of Sweden
Gustav I, born Gustav Eriksson of the Vasa noble family and later known as Gustav Vasa (12 May 1496 – 29 September 1560), was King of Sweden from 1523 until his death in 1560, previously self-recognised Protector of the Realm ("Riksföreståndare") from 1521, during the ongoing Swedish War of Liberation against King Christian II of Denmark, Norway and Sweden.
Initially of low standing, Gustav rose to lead the rebel movement following the Stockholm Bloodbath, where his father was executed.
Gustav's election as King on 6 June 1523 and his triumphant entry into Stockholm eleven days later marked Sweden's final secession from the Kalmar Union.
As king, Gustav proved an enigmatic administrator with a ruthless streak not inferior to his predecessor's, brutally suppressing subsequent uprisings (three in Dalarna – which had once been the first region to support his claim to the throne – one in Västergötland, and one in Småland).
He worked to raise taxes and bring about a Reformation in Sweden, replacing the prerogatives of local landowners, noblemen and clergy with centrally appointed governors and bishops.
His 37-year rule, which was the longest of a mature Swedish king to that date (subsequently passed by Gustav V and Carl XVI Gustav) saw a complete break with not only the Danish supremacy but also the Roman Catholic Church, whose assets were nationalised, with the Lutheran Church of Sweden established under his personal control.
He became the first truly autocratic native Swedish sovereign and was a skilled bureaucrat and propagandist, with tales of his largely fictitious adventures during the liberation struggle still widespread to date.
In 1544, he abolished Medieval Sweden's elective monarchy and replaced it with a hereditary monarchy under the House of Vasa and its successors, including the current House of Bernadotte.
Thus, three of his sons, Eric XIV, John III and Charles IX, all held the kingship at different points.
Gustav
I has subsequently been labelled the founder of modern Sweden, and the "father of the nation".
Gustav liked to compare himself to Moses, whom he believed to have also liberated his people and established a sovereign state.
As a person, Gustav was known for ruthless methods and a bad temper, but also a fondness for music and had a certain sly wit and ability to outmaneuver and annihilate his opponents.
He founded one of the now oldest orchestras of the world, the "Kungliga Hovkapellet" (Royal Court Orchestra).
Royal housekeeping accounts from 1526 mention twelve musicians including wind players and a timpanist but no string players.
Today the "Kungliga Hovkapellet" is the orchestra of the Royal Swedish Opera.
Bernard II, Duke of Saxe-Lauenburg
Bernard II of Saxe- Lauenburg( ca. 1385/1392–16 July 1463) was a member of the House of Ascania and Duke of Saxe- Lauenburg from 1426 to 1463.
His full title was Duke of Saxony, Angria and Westphalia, however only ruling the branch duchy of Saxe- Lauenburg between 1426 and 1463.

Question: When was Catherine Of Saxe-Lauenburg's husband born?
Answer: 12 May 1496