Could Kindred in fact be the Ruined King's son or even son and daughter ...

Trying to find info on the lore and i keep getting linked to other sites; People have been questioning if in fact it is the ruined king, however i was thinking it could be his children, or even their souls in some sort of spirit form. Now my reason for guessing this is because in Kindred,s teaser/lore where it says "He took an axe and split himself in two" now at first thought we think of someone cutting themself in two, however this could be a way of saying they killed a relative (sister who could possibly be a twin explaining the conncetion). Now i know in the ruined kings lore it says that, " Your son is dead. We buried him. We set him to the earth to rest only to find his last bed dug up the next day. You see what you only wish to see. He has broken the island, raised every corpse he could find. He assaulted the living and burned whole towns to dust and ash. And now he slain our daughter, who just like you thought there was still a man's heart beating inside that hollow plate." However maybe killing the daughter was the last act of the sons soul so that he wasn't alone and someone took over his body in order to bring down the land. Also the word Kindred means ones family and relations. This is just a far fetched theory if i have missed something that could prove this all wrong i apologise its my first time delving into lore. Note- sorry if this is badly done i am trying to gather little information from sources and different theory's judging which information is more legit is difficult with so many different theory's out there