Greg Penner
Gregory B. Penner( born December 18, 1969) is an American businessman and venture capitalist.
Penner was named the chairman of Walmart on June 5, 2015.
He is the son-in- law of S. Robson Walton and the grandson- in- law of Sam Walton, the founder of Walmart.
Wyndham Goold
Wyndham Goold( 1812-1854) was a Member of Parliament( MP) for County Limerick from 1850 to 1854.
Goold was educated at Westminster School and Trinity College, Dublin.
He was the son in law of Frederick Falkiner Goold, Archdeacon of Raphoe and brother in law of Bishop Hamilton Verschoyle
Nick Sidi
Nick Sidi( born 22 February 1966 in Manchester, England) is an English actor.
He is the son -in- law of actress Rosalind Knight and brother- in- law of actress Susannah Elliott- Knight.
He often plays drama or comedy roles on television and frequently appears in BBC dramas.
Harald Kidde
Harald Henrik Sager Kidde (14 August 1878 in Vejle – 23 November 1918 in Copenhagen) was a Danish writer and brother of the politician Aage Kidde.
He is best known for the novel "Helten" (The Hero), which is one of the key novels in Danish literature.
Kidde died of Spanish flu in 1918.
He was only 40 years old at the time.
There is an extensive Kidde-archive at Vejle Town Archive.
Marit Törnqvist
Marit Törnqvist( born January 19, 1964) is a Swedish- Dutch author, artist and illustrator.
She was best known for her illustrations in the books of Astrid Lindgren.
Robert Vadra
Robert Vadra is an Indian businessman, entrepreneur and the husband of Priyanka Gandhi.
He is the son -in- law of Sonia Gandhi and Rajiv Gandhi, and the brother- in- law of Rahul Gandhi.
Charles Francis Norton
Charles Francis Norton( 1807 – 1835) was a 19th- century Member of Parliament for Guildford.
Norton was also a Captain of 52nd Light Infantry; son-in- law of Sir Colin Campbell; brother- in- law of writer Caroline Norton
Astrid Ehrencron-Kidde
Astrid Margrethe Ehrencron-Kidde (born January 4, 1871 – June 30, 1960) was a Danish writer and translator.
The daughter of Vilhelm Christian Theodor Müller and Laura Marie Jacobsen, she was born Astrid Margrethe Ehrencron-Müller in Copenhagen.
During her youth, she took piano lessons but an injury ended her dreams of becoming a concert pianist.
She turned to writing and published a collection of stories "Æventyr" in 1901.
She continued to write until 1939, publishing novels and children's literature.
She then translated English and Swedish literature into Danish.
In 1960, she published an autobiography "Hvem kalder.
Fra mine erindringers lønkammer".
In 1931, she was awarded the Tagea Brandt Rejselegat (Travel scholarship).
She married writer Harald Kidde in 1907; he died in 1918.
Ehrencron-Kidde died in Frederiksberg at the age of 89.
Her brother was a Danish librarian.
Robert W. Levering
Robert Woodrow Levering( October 3, 1914 – August 11, 1989) was a U.S. Representative from Ohio, son-in- law of Usher L. Burdick and brother- in- law of Quentin N. Burdick.
Brice Guyart
Brice Guyart( born 15 March 1981 in Suresnes) is a foil fencer from France.
He won a gold medal in the team foil event at the 2000 Summer Olympics and a gold in the individual foil at the 2004 Summer Olympics.
He is the older brother of Astrid Guyart.

Question: Who is the sibling-in-law of Astrid Ehrencron-Kidde?
Answer: Aage Kidde