jacqueline,
The issue of restitution is a very murky situation; I'll use an extreme example to illustrate my case more easily.
Princess Z.N. Yusupova
Land (215,200 Desyatiny) = 21,300,000.00 Rubles
Stocks and Bonds = 3,200,000.00 Rubles
1914 Profits = 730,100.00 Rubles
Never the less, what the Dynasty spent annually exceeded its income. That is not to say that every year they got further and further into debt. That was not the case as the interest of the Stocks and bonds in all likelihood was higher than the interest on the debt the Yususpov's accumulated.
There was in Moscow a very, very large number of Nobles indebted to merchant owned banks, indeed a number of merchants become very wealthy from primarily lending money to the increasingly poorer nobility. All of these records would be, in the recently opened Russian archives. Check out the banks owned by merchants, like the Morozov's.
As an example, lets assume Princess Yusupova borrowed from a Morozov merchant bank a mere 12,000 rubles to make up her income deficit in 1917. Just before the revolution.
Her descendant filled for reparation and received 20,000,000.00Roubles from the current Russian government. (It's more likely she'd get nothing at all).
So government gave her 20 Million Rubles.
+ 20 Million Rubles
Now, let’s assume, also in aforementioned hypothetical situation, that I am a descendant of the owner of that merchant bank. I would in turn sue Yusupov descendant for 100 years of unpaid debt and at perhaps 8% per year for 100 years on a 12,000. Ruble advance I would sue her for 26,397,135. Rubles. She would find herself indebt to me for 6 Million Rubles. So after taking all her current government restitution I would go after her personal fortune in Greece, and once again the yusupov's would find themselves penniless and quite possibly homeless.
You see jacqueline, merchants kept VERY meticulous records. Especially of debtors. I'm sure they are all still there. If nobles care to pursue this they should hope that the descendants of the merchants are not as money hungry, or it may not turn out quite as expected. Although as this entire restitution issue is borne out of the fact that almost after 100 years after the revolution aristocratic descendants yearn for a lifestyle they cannot provide for themselves it could be quite ironic..... To go after money and end up with significant debt...
Regards
James
P.S. Try reading, D. Pokrovskii, "Ocherki Moskvy," Istoricheskii vestnik 51 (Feb. 1893): 793-94.