Since when does a Georgian become a Russian?
A note on the surname. It was a Doukhobor surname that was only found among families that stayed in the Russian empire, a place that includes Ukraine and Georgia.
Tyurin - This
surname originates from tyurya, the term given to bread steeped
in water, kvass or milk (a meal eaten by beggars and the poor). Note that
this term also referred to a "languid" or "spineless" individual. It is
also suggested that the name can derive from the verb tiurit' meaning
"to lie" or "to confuse". The Tiurins among the Doukhobors originated from
the province of Sloboda-Ukraine (Kharkov), Russia in the 18th century.
Among the Doukhobors, this surname occurred only in Russia, not in North American immigrants.