Question: What was the nickname of this Romanian and authoritarian politician under whose regime the chief rabbi of Romania Alexandru Șafran succeeded in saving Jews during the Holocaust?

Context paragraphs:
David Lau: David Baruch Lau (Hebrew: דוד לאו‎ ‎ ; born 13 January 1966) is the Ashkenazi Chief Rabbi of Israel achieving a majority of the vote on July 24, 2013.  He previously served as the Chief Rabbi of Modi'in-Maccabim-Re'ut, Israel and as the Chief Rabbi of Shoham.  Lau is the son of former Ashkenazi Chief Rabbi of Israel Rabbi Yisrael Meir Lau.

David Messas: Rabbi David Messas (15 July 1934 in Meknes, Morocco – 20 November 2011 Paris) was the son of Rabbi Chalom Messas, the former Chief Rabbi of Morocco who subsequently became the sefardic Chief Rabbi of Jerusalem.  He married Dolly Berdugo.  Chief rabbi of Geneva for several years; he was elected Chief Rabbi of Paris for several terms and was at the same time Head of the Rabbinical Council.  He headed the École Maïmonide in Boulogne-Billancourt.  He has been the Chief Rabbi of Paris since 1995.  He died on Sunday, 20 November 2011 in the morning, after a lengthy illness which did not stop him from active duties.  He was 77.  A funeral was held Sunday at his synagogue in Paris with the participation of Rabbi Shlomo Amar.  His body was then flown for burial at Har HaMenuchot in the City of Jerusalem on Monday, 21 November 2011, beside the grave of his father.

Alexandru Șafran: Alexandru Şafran (or Alexandre Safran; September 12, 1910 – July 27, 2006) was a Romanian and, after 1948, Swiss rabbi.  As chief rabbi of Romania (1940–1948), he intervened with authorities in the fascist government of Ion Antonescu in an unusually successful attempt to save Jews during the Holocaust.

Jacob Itzhak Niemirower: Rabbi Dr. Jacob Itzhak Niemirower (Romanian: Iacob Isaac Niemirower, born March 1, 1872 in Lemberg, then in the Austro-Hungarian Empire, now Lviv, Ukraine - died November 18, 1939 in Bucharest, Romania) was a Romanian Modern Reform rabbi, close to reformistic trends in the Western European Judaism, theologist, philosopher and historian.  Served as the first Chief Rabbi of Romanian Jewry between 1921–1939, and was a member of the Romanian Senate from 1927 and until his death.  An ardent supporter of Zionism and a courageous fighter against Antisemitism, Dr. Niemirower defended the civil and human rights of Romanian Jews and led them on the path towards modernization of community life, in the spirit of what he called Cultural Judaism.  This meant adhering to Jewish tradition while remaining open to the Romanian language and culture and to universal influences.

Conference of European Rabbis: The current president of the CER is the chief rabbi of Moscow, Pinchas Goldschmidt, who served as chairman of the Standing Committee for over ten years.  The chairman of the Presidium is associate president Chief Rabbi Ephraim Mirvis.  Before Rabbi Sitruk, the organization was headed by Rabbi Lord Dr Immanuel Jacobovits, Chief Rabbi of Great Britain.  The Executive Director of the CER since inception was Rabbi Maurice (Moshe) Rose, succeeded in the year 2001 by Rabbi Aba Dunner, who passed away in 2011.  In 2017 Mr. Gady Gronich, assumed the position of Chief of Staff to the President of CER and works alongside the Rabbinical Director Rabbi Moshe Lebel ,Secretary Rabbi Aharon Shmuel Baskin and President of Association and Special Adviser of the Board of Patrons Mrs. Shorena Mikava .

Gilles Bernheim: Gilles Uriel Bernheim (] ; born 30 May 1952) is a French rabbi who was formerly the Chief Rabbi of France.  Born in Aix-les-Bains, Savoie, in 1952, he was elected by the general assembly of the Central Consistory chief rabbi of France on 22 June 2008, for a seven-year mandate starting from 1 January 2009.  Until then, he had been rabbi of synagogue de la Victoire, the main synagogue in Paris, since 1 May 1997.  The Chief Rabbi of France was respected as a scholar not only in the Jewish community but in the wider academic world.  However, he resigned as chief rabbi in April 2013 before his term had ended, amid revelations of plagiarism and deception about his academic credentials.

Ephraim Mirvis: Ephraim Mirvis (born 1956) is an Orthodox rabbi who serves as the Chief Rabbi of the United Hebrew Congregations of the Commonwealth.  Traditionally the post has entailed that he also serves as the head of all Jews as the Chief Rabbi of the United Kingdom and Commonwealth.  He served as the Chief Rabbi of Ireland between 1985 and 1992.

Sholom Rivkin: Rabbi Sholom Rivkin (6 June 1926 – 1 October 2011) was an Israeli-born American rabbi.  He was the last Chief Rabbi of St. Louis, Missouri, and the last chief rabbi of one of only a few cities in the United States that has ever had a chief rabbi.  He held the post of Chief Rabbi from 1983 until 2005 and was Chief Rabbi Emeritus until his death in 2011.  He was also a chief judge on the Beth Din of the Rabbinical Council of America, and head of the Vaad Hoeir of St. Louis, the governing body of the St. Louis Orthodox Jewish community.  He was an expert in Jewish law, especially family and divorce law, and was consulted by rabbis and rabbinical courts around the world.

Ion Antonescu: Ion Victor Antonescu (] ; June 15, 1882 – June 1, 1946) was a Romanian soldier and authoritarian politician who, as the Prime Minister and "Conducător" during most of World War II, presided over two successive wartime dictatorships.  After the war, he was convicted of war crimes and executed.

Marchand Ennery: Marchand Ennery was a French rabbi; brother of Jonas Ennery; born in Nancy 1792; died in Paris 21 August 1852; studied Talmud under Baruch Guggenheim and at the rabbinical school of Herz Scheuer, in Mainz.  He went to Paris, became teacher in the family of a wealthy coreligionist, and in 1819 was appointed director of the new Jewish school at Nancy.  At this time he published his Hebrew-French lexicon, the first of its kind to appear in France.  In 1829 he became chief rabbi of Paris; in 1846 chief rabbi of the Central Consistory; in 1850 chevalier of the Legion of Honor.  He was succeeded as chief rabbi by Salomon Ulmann.

Supporting paragraphs: Alexandru Șafran Ion Antonescu
Answer: Conducător