I found some information about the surname Siaperas when searching for my own family history around Sparta, Greece. On a tip from another member, I looked at the General State Archives of Greece.
As part of their online collection is the "Election Material From the Collection of Vlachoyiannis". This includes "General Election Lists" for each Municipality; recorded by community (city, village, settlement, etc.). The links I reference below identify voting age males from the year 1872.
You can view the list by surname at: http://arxeiomnimon.gak.gr/browse/resource.html?tab=01&i...
However, if you do not read Greek, the list is very challenging to navigate. A Greek-to-English translation of the list is available at: http://www.lulu.com/shop/georgia-stryker/municipality-of-sel...
I saw the name of Georgios Tsiaperas, age 58 in this list. If Georgios was 58 at the time, it would have placed his year of birth around 1814. The list indicates Georgios was a farmer by trade and identifies Georgios's father as Dimitrios. I hope this helps. Good luck in your research.