i’m confuse- is the kid aelocks child or rafael?

the one we saw at the carriage in the begging and the 6 children in the end

It’s all Aelock’s kids. But Aelock thought that the reason, Klopp impregnated him was because he looks like Rayfiel. He misinterpreted Klopp’s answer to his question when he went back at the estate, Klopp said Rayfiel (his son) looks like his mother

So he told himself that he didn’t have any kids, that those were all Rayfiel’s kids.

It's Aelock's kids. All surviving kids are born of him only. Klopp gave his firstborn child the name Rayfiel because there's a custom to name first kid on their mother's name .
Klopp wasn't in favor of naming his child Aelock .Cause he's a 'SINNER' .So he intentionally chose his dead ex- wife's name as his kid name .
This was also a slap in the face of Aelock, implying that he wasn't worthy of being part of this custom or becoming a parent.

The dude even taunted MC by rubbing this in his face. But MC was already at his lowest point, not only physically but also mentally, financially, and psychologically. He simply accepted this arrangement .
But mind you, Rayfiel, the son, after becoming an adult, didn't take it well, unlike his late father.