Fritz-Albert Popp
Fritz- Albert Popp( 11 May 1938 – 4 August 2018) was a German researcher in biophysics, particularly in the study of biophotons.
Mitch Maier
Mitchell William Maier( born June 30, 1982) is an American former professional baseball outfielder, coach, and current front office executive.
He is the director of baseball operations for the Kansas City Royals of Major League Baseball( MLB).
He played and coached in MLB for the Royals.
Ronnie Kosloff
Ronnie Kosloff( born July 26, 1948 in Los Angeles, California) is a professor of theoretical chemistry at the Institute of Chemistry and Fritz Haber Center for Molecular Dynamics, Hebrew University of Jerusalem, Israel.
Fritz Albert Lipmann
Fritz Albert Lipmann( June 12, 1899 – July 24, 1986) was a German- American biochemist and a co-discoverer in 1945 of coenzyme A.
For this, together with other research on coenzyme A, he was awarded the Nobel Prize in Physiology or Medicine in 1953( shared with Hans Adolf Krebs).
William J. Maier
William J. Maier( September 13, 1876 in Seneca Falls, Seneca County, New York – December 1941) was an American politician from New York.
He served seven terms in the New York State Assembly, and was briefly in 1922 New York State Comptroller.
Mitch Maier
Mitchell William Maier( born June 30, 1982) is an American former professional baseball outfielder, coach, and current front office executive.
He is the director of baseball operations for the Kansas City Royals of Major League Baseball( MLB).
He played and coached in MLB for the Royals.
Ernst Reiter
Ernst Reiter( born 31 October 1962 in Ruhpolding) is a former German biathlete who represented West Germany.
At the 1984 Olympics in Sarajevo, Reiter won a bronze medal with the West German relay team consisting of Peter Angerer, Walter Pichler and Fritz Fischer.
And at the 1988 Olympics in Calgary.
Reiter won a silver medal with the West German relay team consisting of Peter Angerer, Stefan Höck and Fritz Fischer
Mathias Feist
Mathias Feist( born 1961 in Germany) is a ChessBase and Fritz programmer.
He led the team that programmed Deep Fritz, which has been compared to Deep Blue.
He was hired at the end of the 1980s to port the ChessBase program from Atari ST to DOS.
He soon became an expert in the area of chess engines and connecting them with the ChessBase and Fritz interfaces.
Guy Maier
Guy Maier( August 15, 1891 in Buffalo, New York – September 24, 1956 in Santa Monica, California) was a noted American pianist, composer, arranger, teacher, and writer.
From about 1919 to 1931, he was a member of the popular two- piano team of Maier and Pattison.
Fritz Tarp
Fritz Albert Tarp( August 2, 1899 – January 9, 1958) was a Danish football( soccer) player, who played 44 games for the Denmark national football team from 1918 to 1934, 26 of these as team captain.
He was an unused substitute in the Danish team at the 1920 Summer Olympics.

Question: Did Fritz-Albert Popp and William J. Maier share the same nationality?
Answer: no