Toneri can only come from these

[HashiraMadara SenjUchiha]

He can only be either Hagoromo's child(or related) or Hamura's child(or related) or lost son of Kaguya or his child(or related)
he can't be a distance Hagoromo clansman because the ones with chakra are Kaguya's sons + the clans Hagoromo and Hamura shared chakra with and If toneri doesn't belong in the ones I counted How the heck did he get chakra????

 

[Gerkak]

hogoromo gave chakra to everyone. It shouldn't be surprising that he gave chakra to his fellow clansmen as well.

 

[Young Vongola]

He's a descendant of Kaguya's clan. Pretty much everyone after Hago and Hamura got chakra.

 

[HashiraMadara SenjUchiha]

hogoromo gave chakra to everyone. It shouldn't be surprising that he gave chakra to his fellow clansmen as well.

well I can assume that! and whats with the ugly girl in the avatar

 

[Gerkak]

well I can assume that! and whats with the ugly girl in the avatar

Well she isn't ugly to me.

 

[HashiraMadara SenjUchiha]

Well she isn't ugly to me.

ewwwwwwww that girl looks like a doll