Fun with real-life succession

Among the many reasons I love CK2 is the fact that I also love genealogy. Parts of my family history go back a long way in England, and I thought folks here might be interested in two particular cases I've found that reflect real-life applications of inheritance mechanics that exist in the game.

1. Matrilineal Marriage. In the mid-13th century, an ancestor of mine by the name of Richard de Lymm married a woman named Agnes de Legh. They were cousins at an extended distance (something like fifth cousins twice removed), with Agnes coming from a more prominent branch of the family. While she was the sole heir to her father's manor estate, Richard had no such luck. When they got married, he changed his name to Richard de Legh, and their two children (one male, one female) bore their mother's name instead of their father's. Even their daughter's son, whose father was of notable D'Anyers line and who was himself significant, bore the combined arms of his father and mother in reverse of what would become normal, with his father's arms appearing as an escutcheon of pretense inside his mother's, rather than the other way around.

2. Agnatic-cognatic "gavelkind." A couple centuries later, mid-15th century now, came a very complicated inheritance amongst some members of a particular family line. The deceased had three sons and three daughters. The middle son was dead, but himself had a son and a daughter. The other two sons both had children. The will first gave the manor and its land (The "primary title") to the eldest son. The other surviving son then received the house and lands their father had acquired in the nearest town (the "secondary title"). The deceased son's son received a sizeable chunk of money, to be paid out by the executors as he came of age, with instructions for how his claim would devolve to his sister, then to other inheritors, in the event of untimely death. The daughters and non-inheriting grandchildren all then received a small sum of money. This will was doubly-complicated to figure out for me because it involved a lot of repeated names. The deceased was Thomas, as were two of his grandchildren. Two of Thomas' three sons were named John, and all three sons had daughters named Agnes, a name shared by one of their sisters.

Has anybody else encountered fascinating inheritances or things like that doing family genealogy? Hopefully this doesn't come off as too self-indulgent, I just thought they were great demonstrations of real-life versions of familiar game concepts!