Jean Elias
Jean Elias Peixoto commonly known as Jean Elias( born December 5, 1969) is a former Brazilian football player.
Jean Carioca (footballer, born 1978)
Jean da Silva Duarte, commonly known as Jean Carioca( born 1 September 1978) is a retired Brazilian football defender.
Jean Marie (DJ)
Jean Marie Carrabba( born 20 November 1982), known as Jean Marie is an Italian DJ, Producer, Songwriter and Remixer.
Jean Paulista
Jean Francisco Rodrigues( born 28 November 1977), commonly known as Jean Paulista, is a former Brazilian footballer who played as a forward or an attacking midfielder.
Nicolas Peyrac
Nicolas Peyrac( born 6 October 1949 in Rennes as Jean- Jacques Tazartez) is a French musician, writer and photographer.
Jean de Vienne (archbishop, died 1351)
Jean de Vienne( died 14 June 1351) was a French prelate and diplomat.
He served as the bishop of Avranches( as Jean IV) from 1328 until he was transferred to the diocese of Thérouanne( as Jean III) in 1331.
He was transferred again in 1334 to the archdiocese of Reims( as Jean II), which he held until his death.
Jean twice served the king of France as an ambassador to the Holy See and once as an ambassador to Castile.
Jean Léonard Barrié
Jean Léonard Barrié,( 28 February 1762 in Saint- Béat, Haute- Garonne − 15 February 1848 in Toulouse) was a French general of the Napoleonic era.
Éric Ruf
Éric Ruf( born 21 May 1969) in Belfort, is a French actor, set designer and theatre director.
He appeared in more than thirty films since 1995.
He joined the Comédie- Française in 1993, became a member in 1998 and became is managing director in 2014.
Jean Templin
Janusz Templin( born December 14, 1928), most commonly known as Jean Templin, is a French former football striker.
Jean Léonard Marie Poiseuille
Jean Léonard Marie Poiseuille (22 April 1797 – 26 December 1869) was a French physicist and physiologist.
Poiseuille was born in Paris, France, and he died there on 26 December 1869.

Question: Does Éric Ruf have the same nationality as Jean Léonard Marie Poiseuille?
Answer: yes