Dear Emma, I am a descendant of Didier Numa Joubert and live in Sydney Australia. I have recently started to trace Joubert family and found your post on this site. I have the story of your ancestor written down and knew that he had been awarded a medal by Louis for his role as his physician. My Great Great grandfather's father was Auguste Alexis Franerp Joubert and his wife was Elisabeth Civadier. Didier Numa was their first son and he came to Australia in 1837. The family lived in Angouleme France. It is exciting to know your family live in the Canary Islands and show how adventurous they were in settling in foreign countries. DN Joubert had sugar plantations in New Caledonia and developed one of the most beautiful "garden" suburbs of Sydney, Hunters Hill.
I would like to hear from you if you have time to correspond. Good wishes from Sydney and your distant cousins