Pourquoi ma mère s'appelle Lucienne

The death of my mother's uncle Lucien CASTELBOU on 09/09/1915 gave my grandmother the idea of naming her fourth child Lucien. My grandparents were married while on leave in Paris, having registered their eldest children on their family book, the birth of his fourth son allowed him to be appointed stretcher-bearer and thus to be less in the front line. This child died before the birth of my mother …