Jewish law recognized adopted childern as eligible to inherit
On His mothers side his human inheritance is from the line of David through Nathan..On His stepfathers side He is the King by adoption through the line of Solomon
Sorry, Mom, but it doesn't work that way. You can be adopted into a family, but you do not inherit a genetic lineage. Kingship in Israel is patrilineal, and it is not passed to an adopted son.
Jewish law recognized adopted childern as eligible to inherit
The kingship line of David is not the same as inheriting your father's goats.
On His mothers side his human inheritance is from the line of David through Nathan
That may be, but this doesn't help Jesus's claims to the throne of David.