Code:
dynasty = {
id = ( type = 12 id = 111125 }
name = "von Winterthur"
province = { 241 242 244 245 246 247 }
}
The first line just says that there is a dynasty coming. The ID line gives a unique ID. The type should always be 12. Again, IDs over 200000 tend to be okay. The next line gives the name in quotes. The province = {} line specifies which provinces the dynasty appears in randomly.