早期也是混杂的，父死子继是最简单粗暴的了，其他包括安茹继承法长房优先、诺曼继承法男性长辈优先、立法或遗嘱指定继承顺序等等，除此以外还有武力夺权的。

英国王位继承战争最多了，刀剑就是法律

After the death of his grandfather, Robert II, Count of Artois, in the Battle of Courtrai in 1302, the latter's daughter, Mahaut, inherited the County of Artois in accordance with custom. Because of his age, Robert III could not object to his aunt and assert the rights which he inherited from his father. He would do so later. The rancor and intrigues between Mahaut (sometimes called Mathilde) and Robert occurred within a period of strife between France and England, before the Hundred Years' War.

Because of the premature death of her brother Philip in 1298, she inherited the County of Artois at her father's death in 1302, rather than her nephew Robert III (her inheritance being based upon proximity of blood). Although he repeatedly challenged the decision, her rights to the county were consistently upheld by the Parlement of Paris and the royal court.[4] She was an able administrator and managed to defeat the many rebellions perpetrated by members of the nobility. Her senior administrator was the Bishop of the Roman Catholic Diocese of Arras, Thierry de Hérisson.[5] Upon her death in 1329, the county was inherited by her daughter Joan II, Countess of Burgundy (d. 1330), the widow of Philip V of France.

英国可是典型的习惯法和不成文法哦，不会有的吧

去看《情与理的交锋》，里面有你需要的东西

Ponthieun女伯爵让娜熬死两个儿子后，继承人是女儿埃莉诺和女婿爱德华一世而不是孙子们。孙子让只继承了Aumale伯爵。