Evidence of local inhabitants in and around Jettenbach includes almost every period back to the Stone Age. Of particular note is a settlement hub from the Middle Stone Age which was archaeologically surveyed and analysed over several years. For centuries, Stone Age people camped along the ridge east of the "Witthau" forest. One archaeological find witnessing their presence, a small-bladed knife dates from the late Old Stone Age. At the same site, which was visited several times in the early 1990s, artefacts mainly from the Middle Stone Age were excavated. Only sporadic items were found to date from the New Stone Age.