Eadgils
Eadgils, "AdilsAðilsAdillusAðísl at UppsölumAthislAthislus" or "Adhel" was a semi-legendary king of Sweden, who is estimated to have lived during the 6th century.
"Beowulf" and Old Norse sources present him as the son of Ohthere and as belonging to the ruling Yngling (Scylfing) dynasty.
These sources also deal with his war against Onela, which he won with foreign assistance: in "Beowulf" he gained the throne of Sweden by defeating his uncle Onela with Geatish help, and in two Scandinavian sources ("Skáldskaparmál" and "Skjöldunga saga"), he is also helped to defeat Onela in the Battle on the Ice of Lake Vänern, but with Danish help.
However, Scandinavian sources mostly deal with his interaction with the legendary Danish king Hrólfr Kraki (Hroðulf), and Eadgils is mostly presented in a negative light as a rich and greedy king.
Snorri Sturluson, who documented many of the Scandinavian traditions, reported that the Swedes called him a "great king".
Yrsa
Yrsa, "YrseYrs" or "Urse" (6th century) was a tragic heroine of early Scandinavian literature.
She appears in several versions relating to her husband, the Swedish king Eadgils, and/or to her father and rapist/lover/husband Halga (the younger brother of king Hroðgar who received Beowulf) and their son Hroðulf.
The common claim in "Beowulf" studies that Hroðulf probably was the son of Halga is taken from the Yrsa tradition.
Several translators (e.g. Burton Raffel) and scholars have emended her name from a corrupt line (62) in the manuscript of "Beowulf", although this is guesswork.
In the "Ynglinga saga", Snorri Sturluson describes her personality as follows
(Samuel Laing's translation):Yrsa was not one of the slave girls, and it was soon observed that she was intelligent, spoke well, and in all respects was well behaved.
All people thought well of her, and particularly the king; and at last it came to so far that the king celebrated his wedding with her, and Yrsa became queen of Svithiod, and was considered an excellent woman.
James Armour (Master mason)
James Armour (15 January 1730 – 20 September 1798) was a master mason and father of Jean Armour, and therefore the father-in-law of the poet Robert Burns.
John Adams (merchant)
John Adams( 1672 or 1673 – 1745) was an American- born Canadian merchant and member of the Nova Scotia Council.
He was the father- in- law of Henry Newton( politician).
Peter Burroughs
Peter Burroughs( born 27 January 1947) is a British television and film actor, the director of Willow Management.
He is the father- in- law of actor and TV presenter Warwick Davis.
Bill Dundee
William" Bill" Cruickshanks( born 24 October 1943) is a Scottish born- Australian professional wrestler and author better known by his stage name Bill Dundee.
Cruickshanks is the father of Jamie Dundee and the father- in- law of wrestler Bobby Eaton.
Ogawa Mataji
Viscount was a general in the early Imperial Japanese Army.
He was also the father- in- law of Field Marshal Gen Sugiyama.
Ludwig von Westphalen
Johann Ludwig von Westphalen( 11 July 1770 – 3 March 1842) was a liberal Prussian civil servant and the father- in- law of Karl Marx.
Mohammad Ilyas (cricketer)
Mohammad Ilyas Mahmood( born March 19, 1946, Lahore, Punjab) is a former Pakistani cricketer who played in ten Tests from 1964 to 1969.
He is the father- in- law of Imran Farhat.
Barthold A. Butenschøn Sr.
Hans Barthold Andresen Butenschøn( 27 December 1877 – 28 November 1971) was a Norwegian businessperson.
He was born in Kristiania as a son of Nils August Andresen Butenschøn and Hanna Butenschøn, and grandson of Nicolay Andresen.
Together with Mabel Anette Plahte( 1877 – 1973, a daughter of Frithjof M. Plahte) he had the son Hans Barthold Andresen Butenschøn Jr. and was through him the father- in- law of Ragnhild Butenschøn and grandfather of Peter Butenschøn.
Through his daughter Marie Claudine he was the father- in- law of Joakim Lehmkuhl, through his daughter Mabel Anette he was the father- in- law of Harald Astrup( a son of Sigurd Astrup) and through his daughter Nini Augusta he was the father- in- law of Ernst Torp.
He took commerce school and agricultural school.
He was hired in the family company N. A. Andresen& Co, and became a co-owner in 1910.
He eventually became chief executive officer.
The bank changed its name to Andresens Bank in 1913 and merged with Bergens Kreditbank in 1920.
The merger was dissolved later in the 1920s.
He was also a landowner, owning Nedre Skøyen farm and a lot of land in Enebakk.
He chaired the board of Nydalens Compagnie from 1926, having not been a board member before that.
He also chaired the supervisory council of Forsikringsselskapet Viking and Nedre Glommen salgsforening, and was a supervisory council member of Filharmonisk Selskap.
He was a member of the gentlemen's club SK Fram since 1890, and was proclaimed a lifetime member in 1964.
He was buried in Enebakk.

Question: Who is Yrsa's father-in-law?
Answer: Ohthere