Jeannette would be the equivalent for the English first name Janet.
You can say "la maison de John" in French to mean "John's house".
Janet would be spelled "Jeannette" in French
Jeannette would be the French equivalent of Janet.
The name John in French is "Jean."
Cher John
You would say "Bonjour John, comment ça va ?" in French.
j'aime Jean (or John)
Janet = Ianeke
You would say "Évangile de Jean" in French.
John, fais attention aujourd'hui.
"John Patrick, tu me manques"