barani radjou

I have a few doubts regarding the french government and its benefits My grandfather born in British India in 1911 and he settled down in french India and worked for french army I have been heard from my father that my grandfather got "immatriculation" may be a a residential permit I guess  to settle in Frnech India . what is immatriculation ? when and how a person can apply for it ? I have been heard from my father that my grandfather got Rs 50 for each of his children including my father during every 11th November till his death (1979) . Will that amount be given to non-french citizens also or only to french nationals Please clarify the above two doubts because based on that we can collect documents from consulate  

I am about to contact them now .Some weeks before I did contact one lawyer in India who will give guidance for french nationality .He told that the case is a valid one and since my grandfather's nationality has not been used for the past 50 years (Loss of nationality by disuse) and so that will get expired . My doubt is my grandfather got old age pension and other benefits of a french national till 1979 (till his death) so he did use the nationality and so it will not get expired .Am I right ?

My grandfather worked for french army in the second world war and he got "carte de combattant volontaire de la résistance" card and now my father and myself are trying to get the french nationality .My grandfather enjoyed french benefits like old age pension and other pensions and he did claim for the injury which happened to him during second world war but before the claim amount arrived my grandfather passed away .till 1979 he enjoyed all the french government benefits so that "50 years law (loss of nationality by disuse)" will not impact us I guess . Is my guessing right .We already consulted one french nationality consultant he said ok to get nationality for us before but due to the above said law he said some problems are there.This 50 years count will start from 1979 or when ? that is my confusionI guess the person who hold the nationality should use it in the past fifty years otherwise it will expire Am I right .Please clarify this ? We are having the following list of evidences 1) My grandfather did "renonciation" formalities. when I asked about it to my father he told that it is a method of giving family name in France. That is my grandfather's name is radjagobalou radjou and in my father's name also this family name radjou is there 2) During 11th November (it is something special for france I guess) he got Rs 50 for each of his children till his death 3) He got old age pension from french government till his death (till 1979) 4) He applied some claim for his war time injury but didn't get that amount since he died before that 5) He did Immatriculation since he born in british colonial part in India and settled in French India Please guide can i get the french nationality