Semi-salic Primogeniture is a Law of Succession. It is different from Salic Primogeniture in that females can trace inheritance. This still means that only males can inherit, but inheritance can be traced also through female lines. Still, female lines are ranked after male lines of the same relation.

Primogeniture means that the oldest candidate inherits, in this case the oldest son (if any). All heirs through male lines of the oldest son rank above those of the second oldest son in the line of inheritance, then come heirs of daughters sorted by age.

As as example: King John has three children: William, Edith and Robert. William has two children, Constance and John. Edith is married and has a son Guy. Robert has a son Roger. Let's illustrate this in a chart:

              King John
   |              |      |
William         Edith  Robert 
   |              |      |
   |--------|     |      |
   |        |     |      |
Constance  John  Guy   Roger

Following the law of semi-salic primogeniture, the line of inheritance is as follows:

  1. William
  2. John the younger
  3. (possible sons of Constance)
  4. Robert
  5. Roger
  6. Guy
  7. (If no progeny lives, the line of the oldest brother of King John is searched by the same principles; if no brothers, the line of the oldest sister etc.)

However, this is not always the case. Due to a bug present through version 1.4b, if Guy were older than William and Robert, the order of succession would be as follows:

  1. Guy
  2. William
  3. John the younger
  4. (possible sons of Constance)
  5. Robert
  6. Roger

This is the situation in, for examples, the Duchy of Lower Lorraine and the County of Amiens in the 1066 scenario. This bug does not exist under Semi-salic Consanguinity.

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