Elsa Grether
Elsa Grether( born 28 June 1980) is a French classical violinist, laureate of the" International Pro Musicis 2009 Prize" unanimously by the jury( with pianist Delphine Bardin), who made her recital debut at Carnegie Hall in New York and in Boston in 2012.
Anders Ek
Anders Ek( 7 April 1916 – 17 November 1979) was a Swedish film actor.
He was born in Gothenburg, Sweden and died in Stockholm.
He was married to Birgit Cullberg and is the father of dancer Niklas Ek( born 1943), dancer Mats Ek and actress Malin Ek( twins born 1945).
John Cullberg
John Cyllberg( born 23 April 1896 in Harestad, died 10 August 1983 in Uppsala) was a Swedish theologian and Bishop of Väster ås between 1940 and 1962.
Thumbs Up (film)
Thumbs Up is a 1943 American musical drama film directed by Joseph Santley and starring Brenda Joyce, Richard Fraser and Elsa Lanchester.
Johan Cullberg
Johan Cullberg( born 1934), is a Swedish professor in psychiatry, researcher, psychoanalyst and author of a number of internationally recognized textbooks.
He started his career at the department of gynecology at the Karolinska Hospital studying the effects of birth control.
He came to head of one of the outpatient clinics in the Nacka project, doing groundbreaking work on psychiatric care outside the hospital in Sweden.
He is recognized for advocacy of lower doses of antipsychotic medicine, reduction in compulsory treatment and more humane psychiatric care.
He was awarded the Dobloug Prize( Swedish: Doblougska priset), a literature prize awarded by the Swedish Academy in 2008.
Cullberg is the Son of Bishop John Cullberg and brother of Erland Cullberg, painter, and to Staffan Cullberg, who has been head of the Swedish National Arts Council.
Richard Rumelt
Richard Post Rumelt( born November 10, 1942) is the Harry and Elsa Kunin Emeritus Professor of Business& Society at the University of California, Los Angeles Anderson School of Management.
He joined the school in 1976 from Harvard Business School.
Carl Block
Carl Elis Daniel Block (12 February 1874 - 6 October 1948) was Bishop of Gothenburg from 1929 till 1948.
He was the half-brother of the mathematician Henrik Block and father of the doctor Erik Block and educator Bertil Block.
He was a cousin of John Cullberg.
Anders Ek
Anders Ek( 7 April 1916 – 17 November 1979) was a Swedish film actor.
He was born in Gothenburg, Sweden and died in Stockholm.
He was married to Birgit Cullberg and is the father of dancer Niklas Ek( born 1943), dancer Mats Ek and actress Malin Ek( twins born 1945).
Carl Block
Carl Elis Daniel Block (12 February 1874 - 6 October 1948) was Bishop of Gothenburg from 1929 till 1948.
He was the half-brother of the mathematician Henrik Block and father of the doctor Erik Block and educator Bertil Block.
He was a cousin of John Cullberg.
Johan Cullberg
Johan Cullberg( born 1934), is a Swedish professor in psychiatry, researcher, psychoanalyst and author of a number of internationally recognized textbooks.
He started his career at the department of gynecology at the Karolinska Hospital studying the effects of birth control.
He came to head of one of the outpatient clinics in the Nacka project, doing groundbreaking work on psychiatric care outside the hospital in Sweden.
He is recognized for advocacy of lower doses of antipsychotic medicine, reduction in compulsory treatment and more humane psychiatric care.
He was awarded the Dobloug Prize( Swedish: Doblougska priset), a literature prize awarded by the Swedish Academy in 2008.
Cullberg is the Son of Bishop John Cullberg and brother of Erland Cullberg, painter, and to Staffan Cullberg, who has been head of the Swedish National Arts Council.

Question: Do John Cullberg and Elsa Grether have the same nationality?
Answer: no