Renville's and Landroche's in Illinois 1873

I'm seeking information on Arthur Landroche and Elmina Landroche that were involved in a custody battle between Bebieene Renville and Louis Renville in Iroquois Co., Illinois. Louis was apparently the step father and Bebienne was there grandmother. Louis has a brother named Paul and another name that comes up is Napoleon. I have all of the court papers. But I'm trying to figure out the association between the two families, and what happened to Arthur and Elmina's parents.(Louis and Mary Landroche). Is this familiar to anyone?