Leopold Agar-Ellis, 5th Viscount Clifden
Leopold George Frederick Agar- Ellis, 5th Viscount Clifden( 13 May 1829 – 10 September 1899), known as Leopold Agar- Ellis until 1895, was a British Liberal politician.
Phan Thanh Bình
Phan Thanh Bình( born November 1, 1986) is a retired Vietnamese footballer who played as a striker.
He was a member of the Vietnam national football team.
Leopold Courvoisier
Leopold Courvoisier( 1873 – 1955) was a Swiss astronomer.
He was born in Riehen, Switzerland, near Basel.
He was the chief observer at the observatory in Babelsberg( near Berlin) from 1905 to 1938.
Adolf Tachezy
Adolf Tachezy, also known as Leopold Adolf Tachezy( 20 February 1814 – 25 March 1892), was an Austrian and Czech politician.
He was a member of the Czech Provincial Assembly from 1867 to 1878, and served as the mayor of Cheb from 1873 to 1882.
Phan Thanh Hùng
Phan Thanh Hùng( born 1960) is a Vietnamese retired footballer who played as a striker.
He is now the manager for Than Quảng Ninh.
Hùng was also the head coach of Vietnam in 2012.
Phan Thanh Liêm
Phan Thanh Liêm,( 潘清簾, August 29, 1833 – 1896), was a Vietnamese soldier, politician, nationalist and( anti-French) independence activist.
He was the son of Phan Thanh Giản.
Leopold, Duke of Bavaria
Leopold( c. 1108 – 18 October 1141), known as Leopold the Generous, was Margrave of Austria as Leopold IV from 1136, and Duke of Bavaria as Leopold I from 1139 until his death in 1141.
Phan Thanh Hưng
Phan Thanh Hưng( born 14 January 1987) is a Vietnamese footballer who plays as a Central Midfielder for V- League( Vietnam) club Quảng Nam F.C. and the Vietnam national football team.
Phan Thanh Giản
Phan Thanh Giản( November 11, 1796 – 1867) was a Grand Counsellor at the Nguyễn court in Vietnam.
He led an embassy to France in 1863, and committed suicide when France completed the invasion of Southern Vietnam( Cochinchina) in 1867.
Phan Thanh Giản's grandfather was a Minh Hương( Ming dynasty refugees, with ancestry from Haicheng.
Southern Fujian Province in China), while his grandmother was a Vietnamese woman.
Phan Thanh Giang
Phan Thanh Giang( born 3 October 1981) is a Vietnamese footballer who plays for Đồng Tâm Long An.
He played for Vietnamese international at the 2008 AFF Suzuki Cup.

Question: Does Phan Thanh Liêm have the same nationality as Leopold Courvoisier?
Answer: no