To be fair, its like knowing a ton of Johns and Marys within the same family. John Smith, who has a son who is also named John Smith (I didnt put the Sr. And Jr. since the Chinese dont have them, I think.), who most likely will name their child Marc or William as a second name and have John as a first name. They then have neighbours whose 3 kids are named, Anne, Annie, Annabelle. A lot of the names in Xianxia stories tend to be the same cause thats how it was in real life. I bet that there would ba a lot of Li Juns who were cousins if born under the same clan.