Friedrich Wilhelm Schäfke
Friedrich Wilhelm Heinrich Schäfke( 21 July 1922 in Berlin, Weimar Germany – 4 April 2010) was a German mathematician and professor of geometry.
Wilhelm Heinrich Funk
Wilhelm Heinrich Funk( 1866–1949) was a German- American portrait painter.
Wilhelm Heinrich, Duke of Saxe-Eisenach
Wilhelm Heinrich, Duke of Saxe- Eisenach( 10 November 1691 – 26 July 1741), was a duke of Saxe- Eisenach.
He was born in Oranjewoud, the eldest and only surviving son of Johann Wilhelm, Duke of Saxe- Eisenach and his first wife Amalie of Nassau- Dietz.
Wilhelm Heinrich first married Albertine Juliane of Nassau- Idstein( daughter George August, Count of Nassau- Idstein) in Idstein on 15 February 1713.
This marriage was childless.
He married his second wife Anna Sophie Charlotte of Brandenburg- Schwedt in Berlin on 3 June 1723, just eight months after the death of Albertine Juliane.
The second marriage was also childless.
Wilhelm Heinrich acceded to the duchy of Saxe- Eisenach in 1729 upon the death of his father and was succeeded by his second cousin, duke Ernst August I of Saxe- Weimar.
The personal union between Eisenach and Weimar created by this succession was only nominal until 1809, when the two patrimonies were formally united.
He died in Eisenach.
Alfred Kast
Alfred Kast( 25 July 1856 in Illenau, near Achern – 7 January 1903) was a German internist.
He studied medicine at the Universities of Heidelberg, Freiburg and Leipzig, earning his doctorate in 1879.
He served as an assistant to Wilhelm Heinrich Erb( 1840 – 1921) in Heidelberg, Julius Friedrich Cohnheim( 1839 – 1884) in Leipzig, and from 1881 was a clinical assistant to Christian Bäumler( 1836 – 1933) at Freiburg.
Here he also worked in the physiological- chemical institute.
In 1886, he became an associate professor, followed by a directorship at Eppendorf Hospital in Hamburg( 1888).
He 1892 he was named professor of internal medicine at the University of Breslau.
Kast was instrumental in introducing phenacetin and the sulphonal group of drugs into medicine.
His name is associated with" Kast ’s syndrome", a condition synonymous to Mafucci syndrome.
Wilhelm Heinrich Waagen
Wilhelm Heinrich Waagen( 23 June 1841 – 24 March 1900) was a geologist and paleontologist.
He was born in Munich and died in Vienna.
Wilhelm Solf
Wilhelm Heinrich Solf (5 October 1862 – 6 February 1936) was a German scholar, diplomat, jurist and statesman.
Walter Baade
Wilhelm Heinrich Walter Baade( March 24, 1893 – June 25, 1960) was a German astronomer who worked in the United States from 1931 to 1959.
Wilhelm Heinrich Erb
Wilhelm Heinrich Erb( 30 November 1840 – 29 October 1921) was a German neurologist.
He was born in Winnweiler, and died in Heidelberg.
Biagio Biagetti
Biagio Biagetti (21 July 1877 – 2 April 1948) was an Italian painter and art-restorer, mainly working with sacred subjects.
Wilhelm Heinrich Detlev Körner
Wilhelm Heinrich Detlev "Big Bill" Körner (November 1878 – August 11, 1938), also known as Wilhelm Heinrich Dethlef Koerner, William HD Koerner, WHDK, or W.H.D. Koerner, was a noted illustrator of the American West whose works became known to new audiences when his painting, nicknamed "A Charge to Keep", was used as the cover image for the ghostwritten biography by the same name by George W. Bush.
This painting, which hung in the Oval Office during the Bush presidency was of special interest to journalists due to the interpretation given by Bush of the painting's meaning in light of the meaning and title attached to the painting by the artist.

Question: Did Wilhelm Heinrich Erb and Biagio Biagetti have the same nationality?
Answer: no