Jean de Bonsi (Florence, 1554 – 4 July 1621) was born in Florence, Italy to Domenico Bonsi, prime minister of the Duke of Tuscany, and Costanza Vettori.

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Jean de Bonsi
Cardinal priest of Sant'Eusebio; Member of Congregation for Universal Inquisition
See	Bishop of Béziers (nowadays part of the Archdiocese of Montpellier) Emeritus
Installed	20 July 1615—4 July 1621
Predecessor	Tommaso Bonsi
Successor	Domenico Bonsi
Other post(s)	Previously Cardinal priest of S.Clemente
Orders
Created cardinal	17 August 1611
Personal details
Born	1554 Florence, Italy
Died	4 July 1621(1621-07-04) (aged 66–67) Rome

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He studied in University of Padua canon and civil law. Ferdinando I de' Medici, Grand Duke of Tuscany, named him an arbiter on the differences between him and Pope Clement VIII, concerning territorial limits. Later he became lawyer in Rome.

He was named Bishop of Béziers (nowadays part of the Archdiocese of Montpellier) after his uncle Tommaso Bonsi on 11 February 1598 and consecrated on 30 September that year. He served as bishop till 1611 and was succeeded by his nephew Domenico Bonsi - coadjutor bishop of the same diocese, followed by other members of De Bonsi family.

Jean de Bonsi was created cardinal priest in the consistory of 17 August 1611 by Pope Paul V. Later in 1615 he received the red hat and was appointed to the title of S.Clemente until 1621 when he was opted for the title of Sant'Eusebio for about six months before his death on 4 July 1621 in Rome.