The oldest register entries for Horitschon appear in the books of the parish of Neckenmarkt in the period from 1653 to the re-establishment of the parish of Horitschon in 1696. From this year onwards, Horitschon has its own registers.
Unterpetersdorf belonged to the parish of Horitschon until the establishment of the independent local parish of Unterpetersdorf-Haschendorf on 1 January 1939.
Haschendorf was a branch parish of Horitschon from 1696 to 1789. During this time, the registers for Haschendorf can be found in the books of the Horitschon parish.
- 01 Horitschon Ta 1816-1905 DE Horitschon
- 02 Horitschon Ta 1789-1816 DE Horitschon
- 03 Horitschon Ta-Tr-Str 1748-1788 DE Horitschon
- 04 Horitschon St 1867-1905 DE Horitschon
- 05 Horitschon Ta-Tr-Str 1710-1732 DE Horitschon
- 06 Horitschon Tr 1789-1901 DE Horitschon
- 07 Horitschon Str 1789-1866 DE Horitschon
- 08 Horitschon Tauf-Tr 1696-1709 DE Horitschon
- 09 Horitschon Tauf-Tr-Str 1731-1747 DE Horitschon