Complex sentence: Stephen I (1065--1102), Count Palatine of Burgundy, sharing his father's nickname "the Rash" (French "tête hardie"), was Count of Burgundy and Count of Mâcon and Vienne.
Split into simpler sentences: Stephen I (1065--1102), Count Palatine of Burgundy, shared his father's nickname "the Rash" (French "tête hardie"). He was Count of Burgundy and Count of Mâcon and Vienne.