In a will, his aunt Marie Louise Elisabeth DELEVEMONT mentions his wife as her English niece and as a matter of fact they got married in London (Saint-Anne Soho, Westminster) in 1769.
John Lewis LEFEBURE and Jane PARIS both of this parish were married in this Church by Banns the 18th day of July 1769
Witnesses : Margrit COPPIN et John ELCOCK.
Her signature is Jane PARIS.
It seems that she was a Protestant.
That's all I know about her. It's a brick wall.
David
Do you know that she was Protestant? Or do you assume she was Protestant because she married in a Church of England (also known as Anglican) church which was a Protestant church? All marriages in England in 1769, except of Jews and Quakers, had to be in an Anglican church. Catholics and Non-Conformists had to be married by a C. of E. clergyman in the Church of England. It was law. (Lord Hardwickes' Marriage Act 1753 or 1754)
Some Catholic couples also had a Catholic wedding ceremony if there was a priest available. A Catholic priest who officiated at a wedding between a Catholic and a Protestant risked arrest and imprisonment until late 18th century.
A Pope at the time issued an edict recognising marriages of Catholics who had married according to the law of the country in which they were living.
The Hardwicke marriage law remained until 1837. Even after 1837 some Catholics continued to marry in Anglican churches, one reason being it was cheaper.
You probably know all this now. 
Hello,
When I started my search I didn't know that. I do know it now but thank you for the reminder.
As a matter of fact, I don't know what her religion was. The only sure fact is that her husband and their children were Catholics. The funny thing is that their daughter, Françoise Louise Jeanne LEFEBURE, born in Paris around 1774, married a former Catholic priest, Louis CAILLET (1764-1840), in 1794 (during the French Revolution, priests could marry and many did. Louis CAILLET became a priest in 1789, he was a teacher before that). After the Revolution, it became a problem.
The Reconstruction of Catholicism after the Revolution and the ...
https://www.researchgate.net/.../292804140_The_Reconstruction_of_Catholicism_after_...
9 févr. 2018 - Full-text (PDF) | The Reconstruction of Catholicism after the Revolution and the Mission of Cardinal Caprara. ... reconciliation of the nearly six thousand priests married during the French Revolution.2 How ... Documents sur les négociations du Concordat et sur les autres rapports de la France avec le.
In 1804, Louis CAILLET and his wife want to reintegrate the Catholic Church as the opportunity is given to them. They have three children and the record says that they want their 9 years old girl to be baptized (it's Jeanne Louise CAILLET born in 1795, she never married and died in Paris in 1856).
I know that their fourth child, my great-great-great-grandfather, Charles Nicolas Henry CAILLET, got baptized in 1807, shortly after his birth.
If Jane PARIS was a Catholic, I wonder why they married in London and not in France where they would have received the proper blessings in a Catholic church. The fact that a rehabilitation occurred in France in 1778 doesn't help much. It could mean that she was a Protestant and that after her conversion to Catholicism, they had to remarry. On the contrary, does it mean that she was a Catholic and that their marriage in a Protestant church was considered as invalid? I don't know what the rules were in those times.
Too bad that the 1778 marriage record is lost, burnt in 1871.