This would be matrilineal, where the line of the mother was the relevant line, and not of the father: in order to be a king, one needed to have the royal mother and the father was irrelevant. The dynasty would be traced by the female line in this case (even if the kings were the rulers).
Seen by the map, almost every railroad crosses into Fort Worth in Texas. It was also a major hub for cattle drives, which is why the railroads went there also.
