Joran Eriksson in Kånna is representing the daughter Karin (I think this may be the first wife's brother possibly) Jacob S? from Ljungen is representing the daughter Maria (not sure who he might be yet) Nils Arvidsson?? from Kånna is representing the son Pär? (if I have the name right - maybe a brother of the boy's father?)
Jacob Sunesson, Impossible to read where he lived but it seems to start with "Hång..." Nils Axselsson, normally spelled Axelsson. Neither Sune nor Axel were very common names at that time, so they should be possible to track quite easily