Don't have any reasonable good links available but over here, further East (present-day Romania and then the Roman province of Dacia) there was a strong presence of Oriental/Siro-Palmyrian deities like Mithras, Dea Syria or Belus. There's this (non-academic) page [1] in Romanian which you can use Google translate on in order to get a better hang of it.

[1] https://historia.ro/sectiune/general/culte-si-credinte-in-da...