I don't understand.
Every small town in France has one cemetery. The cemetery has the same name as the town. They do not have special names.
(In a towns with more than one cemetery, a cemetery almost always has the name of the nearest church, usually for Blessed Mary, or a saint. In medium cities, cemeteries have mostly Catholic names, such as Miséricorde, Assomption, etc. In largest cities, cemeteries are mostly named for topographical place names, such as Montmarte, Montparnasse, Le Tertre, Boutellerie (an old factory), etc.)
What more is to know?
Lantosque is a very small place. Why is Lantosque Cemetery not satisfactory for you?
All I can say is write to the mayor of Lantosque. His name is Jean THAON. Here is his complete address:
Mairie de Lantosque village
Or better, call him on your telephone. His telephone number is : 08 99 69 58 50 --- Note: The city hall is only open Monday through Wednesday & Friday 8h00 to 12h00, and on Thursday 14h00 to 17h00.
Here is the official French government informational website for Lantosque if you are looking for other informations:http://www.annuaire-mairie.fr/mairie-lantosque.html
Bonne quête !