KIllinchy Church of Ireland records start in 1819 and the non Subscribing Presbyterian records in 1812. No other denomination in the immediate area has records that cover 1835, so chances are the ceremony was ta one of those 2 churches. Tradition was to marry in the bride’s church so it’s likely that she was of whichever denomination the church was.
The church of Ireland baptism records for Killinchy are on-line (on rootsireland a subscription site), but the pre 1845 marriages are not. The NSP records are not on-line anywhere, so far as I am aware. There are however copies of both churches records in PRONI, the public record office in Belfast. Their copies are not on-line and so a personal visit is required to access them. If you are unable to go there yourself, you may need to employ a researcher.
This site has a lot of Co. Down material, you might find some reference to the families there:
http://freepages.genealogy.rootsweb.ancestry.com/%7Erosdavies/