"Raison de plus" means - all the more reason (for doing something).
The reason of my choice
"je déteste vous donner une raison de parler de moi" means "I hate giving you a motive for speaking about me"
Mariage de raison - 1899 was released on: France: 1899 USA: 1899
Raison d'être
tu es ma raison d'être, ma raison de vivre
Raison d'être means "reason to be / reason for being" in English.
The word "walida" is not a French word. "Ma raison de vivre" means "My reason for living".
The cast of Raison technique - 1986 includes: Hilt de Vos
tu es ma raison de vivre, tu es ma raison d'être
you are my reason for living
The cast of Caza et la raison du plus fort - 1914 includes: Lucien Cazalis as Caza
I believe it means "I am very happy because of you" or "You make me very happy"