So, anyone who had owned a plot of land was at least deserving of property rights - but given that lots of people's in the 20th century were unfairly stripped of their property rights and never compensated, I wouldn't expect anything.
As they did not possess sovereignty in the region, I don't recognize any sort of collective national claim of ownership to the overall region.
Palestinian land is where they were before being ethnically cleansed since the Nakba.
So, anyone who had owned a plot of land was at least deserving of property rights - but given that lots of people's in the 20th century were unfairly stripped of their property rights and never compensated, I wouldn't expect anything.
As they did not possess sovereignty in the region, I don't recognize any sort of collective national claim of ownership to the overall region.