This page contains information regarding s7, and thus may contain spoilers.
In 19th century Ireland, the village priest was considered th most prominent member of the community, and was held in the highest regard. The term father was the proper form of address for a priest of the Catholic denomination of Christianity. The character of Mulligan within the Fair Haven holographic program, played by The Doctor, was addressed this way. (VOY: "Fair Haven", "Spirit Folk")
On Kaminar, each Kelpien village had a priest. Their function was to sustain the belief in the Great Balance, making them collaborators with the Ba'ul, the Kelpien predator species. They also served as intermediaries with the Ba'ul, and connected all the extended communities together. (DIS: "The Sound of Thunder")
Following the Occupation of Bajor, Bajorans no longer followed their D'jarras. According to Akorem Laan, "Artists have become soldiers, priests have become merchants, and farmers have become politicians." (DS9: "Accession")