Did you really mean that your great-great-great grandfather was born in 1929? Or did you mean 1829? Swiss privacy laws are very strict. If you were looking for someone born in 1929, you would have to work through the local or cantonal civil registration authorities. If the date is 1829, it's likely a different bureaucracy, possibly the cantonal archives or the town or parish archives. Look for a web site for the cantonal archives, which will have some information for genealogists.
In either case, the odds of success are greatly increased if you can find the full name and exact date of birth from other sources, such as family records, a passport, an obituary, a tombstone, etc. In Swiss families, it frequently happens that the same baptismal names are repeated, so that many cousins end up with approximately the same names. Without the exact date of birth, it is often difficult to establish which of several births with similar names is the one you want.
Good luck with your search.