1JardOld French, "jard", garden 
2Jarnac-ChampagneGerman name Latinised to Aganarus + acum 
3JarnePossibly German name Agarna 
4JarrieGarric, rocky ground where the chêne kermès grows 
5Jarrie-AudouinGarric(chêne kermès) + Audouin (Frankish personal name)
6JazennesOld Provencale "jazena", long strip of land + ialoa long strip clearing
7JonzacLatin name Juventius + -acum 
8Juicq  
9JussasLatin name Justius with -acum