Romanos Argyros (10th century)
Romanos Argyros was a Byzantine aristocrat and son-in- law of Emperor Romanos I Lekapenos.
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.
Arundathi Nag
Arundhati Nag (née Rao; born 6 July 1956) is an Indian film and theatre actress.
She has been involved with multilingual Theatre in India, for over 25 years, first in Mumbai where she got involved with Indian People's Theatre Association (IPTA), and did various productions in Gujarati, Marathi, and Hindi theatre, and then in Kannada, Tamil, Malayalam and English, in Bangalore.
They stayed in Chintamani , Karnataka for a few years.
Following her marriage to Kannada actor-director Shankar Nag (1954–1990), her association with theatre continued in Bangalore, where she performed several plays in Kannada: Girish Karnad's "Anju Mallige27 Mavalli Circle" based on the famous play "Wait Until DarkSandhya Chayya" (Jayant Dalvi), Girish Karnad's "Nagamandala", and Bertolt Brecht's "Mother Courage" as "Hulaguru Huliyavva".
She also worked in several Kannada movies:
"Accident" (1984), "Parameshi Prema Prasanga" (1984) and "Nodiswamy, Navirodu Heege" (1987).
Nag went on to realise a long-time dream of building a theatre space dedicated to quality theatre in Bangalore Ranga Shankara: .
She is a recipient of the Sangeet Natak Akademi Award (2008), the Padma Shri (2010) and the National Film Awards (57th) in 2010.
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.
Lee Chan-hyuk
Lee Chan- hyuk( born September 12, 1996), is a South Korean singer, songwriter and producer.
He debuted as a member of the sibling duo AKMU in April 2014, under YG Entertainment.
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.
Shankar Nag
Shankar Nagarakatte (ಶಂಕರ್ ನಾಗರಕಟ್ಟೆ) (9 November 1954 – 30 September 1990) was an Indian actor, screenwriter, director, and producer known for his work in Kannada cinema and television.
He directed and acted in the teleserial, "Malgudi Days", based on celebrated novelist R. K. Narayan's short stories.
Shankar Nag received the inaugural IFFI Best Actor Award (Male)
: Silver Peacock Award" at the 7th International Film Festival of India for his work in the film "Ondanondu Kaladalli".
He co-wrote "22 June 1897", an Indian national award-winning Marathi film.
He is the younger brother of actor Anant Nag.
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.
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
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

Question: Who is the sibling-in-law of Arundathi Nag?
Answer: Anant Nag