Complex sentence: Jacques Cujas or Cujacius (or as he called himself, Jacques de Cujas) (1520--1590), French jurisconsult, was born at Toulouse, where his father, whose name was Cujaus, was a fuller.
Split into simpler sentences: Jacques Cujas or Cujacius (or as he called himself, Jacques de Cujas) (1520--1590) was a French legal expert. He was born at Toulouse, where his father, surnamed Cujaus, was a fuller.