Recherche Christiane Caupain

My name is Teresa do Carmo Caupain Craveiro, born Angola, 21 January 1969 to Christiane Charlene Caupain and Fernando Vladimiro Goncalves Craveiro. I am searching for my mother, Christiane. She was born in Luluabourg, Belgian Congo, 20 November 1950 (father Gaston, mother Tistedon Th.), and moved to Angola with her family in or around 1959. She possibly has several brothers, and I believe their names are Charlie (?), Tonton (?), Gaston (?), Pierre (?), Alain (?). She also has a sister called Arlette (?), married to a bull-fighter called Valerio (?). Does anyone have information on these people that they could share with me? Thank you.