Question: Hans Albert Einstein had a close personal connection to what Serbian physicist born in 1875?

Context articles: Albert Einstein Square
Bernhard Caesar Einstein
Helen Dukas
Hans Albert Einstein
Albert Einstein Award
Albert Einstein Peace Prize
Albert Einstein ATV
Mileva Marić
Ilse Rosenthal-Schneider
Evelyn Einstein

Albert Einstein Square (Kikar Albert Einstein) is a public square in Jerusalem, Israel, named for the physicist Albert Einstein.
 It is located in the Kiryat Shmuel neighborhood, on the grounds of the Council for Higher Education in Israel, Israel Academy of Sciences and Humanities, and Van Leer Jerusalem Institute.
Bernard Caesar Einstein (10 July 1930 – 30 September 2008) was a German-born Swiss-American physicist, the son of Hans Albert Einstein.
 Of the three known biological grandchildren of Albert Einstein, all sons of Hans, he was the only one to survive childhood.
Helen Dukas (17 October 1896 – 10 February 1982) was Albert Einstein's secretary.
 She also co-authored "" and co-edited "Albert Einstein: The Human Side" with Dr. Banesh Hoffmann.
 Dukas was one of two trustees chosen by Einstein, according to his Last Will and Testament, to hold the literary rights to all of his manuscripts, copyrights, publication rights, royalties, and royalty agreements.
 The other trustee was the economist Dr. Otto Nathan.
 In short, Dukas and Dr. Nathan were the "executors of his literary heritage."
 They collaborated on the compilation of "The Collected Papers of Albert Einstein," using documents that were subsequently donated to the Hebrew University of Jerusalem.
Hans Albert Einstein ( ; May 14, 1904 – July 26, 1973) was a Swiss-American engineer and educator, the second child and first son of Albert Einstein and Mileva Marić.
 Hans A. Einstein was a professor of Hydraulic Engineering at the University of California, Berkeley, and was recognized for his research on sediment transport.
 His papers are held at the Water Resources Collections and Archives in the University of California, Riverside Libraries and in the University of Iowa Libraries Special Collections and Archives.
This award should not be confused with many others named after the famous physicist, such as the Albert Einstein World Award of Science given by the World Cultural Council (since 1984), the Albert Einstein Medal given by the Albert Einstein Society (since 1979), nor with the Hans Albert Einstein Award, named after his son and given by the American Society of Civil Engineers (since 1988).
 It was established much earlier than these, when Einstein was still alive and was a professor at the Institute for Advanced Study.
 It has been called "the highest of its kind in the United States" by "The New York Times".
 Some considered it as "the prestigious equivalent of a Nobel Prize".
The Albert Einstein Peace Prize is/was a peace prize awarded annually since 1980 by the Albert Einstein Peace Prize Foundation.
 The Foundation dates from 1979, the centenary of the birth of Albert Einstein, and evokes the Russell–Einstein Manifesto which urges nuclear disarmament.
 It was established, with the sponsorship of the trustees of Einstein's estate, by William M. Swartz (1912–87) a wealthy businessman and the grandfather of activist Aaron Swartz.
 William M. Swartz was involved in the Pugwash Conferences on Science and World Affairs and established the Foundation in part to support Pugwash.
 Prize winners, mainly active in nuclear disarmament, receive(d) $50,000.
The "Albert Einstein" ATV, or Automated Transfer Vehicle 004 (ATV-004), was a European unmanned cargo resupply spacecraft, named after the German-born physicist Albert Einstein.
 It was built to supply the International Space Station (ISS) with propellant, water, air, and dry cargo, and also to reboost the station's altitude with its thrusters.
 It was the fourth and penultimate ATV to be built, following the "Edoardo Amaldi", which was launched in March 2012.
 "Albert Einstein"<nowiki>'</nowiki>s components were constructed in Turin, Italy, and Bremen, Germany, and underwent final assembly and testing in Bremen in 2012.
 The spacecraft left Bremen for Kourou on 31 August 2012 to begin launch preparations.
Mileva Marić (Serbian Cyrillic: Милева Марић; December 19, 1875 – August 4, 1948), sometimes called Mileva Marić-Einstein or Mileva Marić-Ajnštajn, was a Serbian physicist.
 She was the only woman among Albert Einstein's fellow students at Zürich's Polytechnic and was the second woman to finish a full program of study at the Department of Mathematics and Physics.
 Marić and Einstein were lovers and had a daughter Lieserl in 1902; she died in 1903 before their marriage later that year.
 They later had two sons, Hans Albert and Eduard.
Ilse Rosenthal-Schneider (April 25, 1891 – February 6, 1990) was a German-Australian physicist and philosopher.
 She is best known for her collaboration and correspondence with physicists Albert Einstein, Max von Laue, and Max Planck.
 Rosenthal-Schneider earned a PhD in philosophy in 1920 at the University of Berlin, where she first met Albert Einstein.
 After leaving Nazi Germany and emigrating to Australia in 1938, she became a tutor in the German department at the University of Sydney in 1945 and taught history and philosophy of science.
 In the 1940s and 1950s, she exchanged a series of letters with Albert Einstein about philosophical aspects of physics, such as theory of relativity, fundamental constants and physical reality.
 She remained in contact with Einstein through correspondence until the death of Einstein in 1955.
Evelyn Einstein (28 March 1941 – 13 April 2011) was the adopted daughter of Hans Albert Einstein, the son of Albert Einstein.