Complex sentence: She was the eldest daughter of Edward of the Palatinate and his Italian wife, Anna Gonzaga; thus, she was a first cousin, on her father's side, of King George I of Great Britain and Elizabeth Charlotte of the Palatinate.
Split into simpler sentences: She was the eldest daughter of Edward of the Palatinate and his Italian wife, Anna Gonzaga. On her father's side, she was a first cousin of King George I of Great Britain and Elizabeth Charlotte of the Palatinate.