The House of Oldenburg is a North German dynasty and one of Europe's most influential Royal Houses with branches that rule or have ruled in Denmark, Russia, Greece, Norway, Schleswig, Holstein, Oldenburg and Sweden. The current Queen of Denmark, the King of Norway and the ex-King of Greece as well as consorts of Spain, Greece and the United Kingdom belong to this House.

It rose to prominence when Count Christian I of Oldenburg was elected King of Denmark in 1448, and of Norway in 1450. The house has occupied the Danish throne ever since.

Marriages of medieval counts of Oldenburg had paved the way for their heirs to become kings of various Scandinavian kingdoms. Through marriage with a descendant of King Valdemar I of Sweden and of King Eric IV of Denmark, a claim to Sweden and Denmark was staked, since 1350.

At that time, its competitors were the successors of Margaret I of Denmark. In the 15th century, the Oldenburg heir of that claim married Hedwig of Schauenburg, a descendant of Euphemia of Sweden and Norway and also a descendant of Eric V of Denmark. Since descendants better situated in genealogical charts died out, their son Christian (the abovementioned) became the king of all three kingdoms of the whole Kalmar Union. The House of Mecklenburg was its chief competitor regarding the Northern thrones, and other aspirants included the Duke of Lauenburg. Different Oldenburgine branches have reigned in several countries. The House of Oldenburg was briefly poised to claim the thrones of England and Scotland through the marriage of the Stuart Princess Anne (later Queen) to Prince George of Denmark and Norway; however, following the early death of their only heir, Prince William, Duke of Gloucester, the line of succession passed to the House of Hanover.

Steven Lee "Luke" Lukather (born October 21, 1957) is an American guitarist, singer, songwriter, arranger, and record producer best known for his work with the rock band Toto. A prolific session musician, Lukather has recorded guitar tracks for more than 1,500 albums representing a broad array of artists and genres. He has also contributed to albums and hit singles as a songwriter, arranger, and producer. Lukather has released six solo studio albums and is working on his seventh.

In 1976, when Lukather was nineteen years old, he was invited by his high school friends David Paich and the Porcaro brothers Steve and Jeff to join them in forming their band, Toto. He remained a member until the band split up in 2008, and has been involved in their periodic reunion tours. Lukather's reputation as a guitarist and his association with Paich and Jeff Porcaro, who also became established artists, allowed him to secure a solid flow of session work in the 1970s and 1980s. Lukather has been nominated for twelve Grammy awards, and has won five. While his work with Toto was predominantly based on pop rock music and his solo work ventures into progressive rock and hard rock, many of Lukather's side-projects are focused on jazz fusion. He held a long-time collaboration with jazz guitarist Larry Carlton that produced a Grammy-winning live album, and he was a member of the jazz fusion band Los Lobotomys, a collaboration of notable session musicians.