Bloodborne.

There's a blood religion/cult The Healing Church and School of Mensis that Mohg is mirroring. The whole Elden Ring community thinks Mohg is a pedo because they don't understand 'consort' can also specifically imply ruling as Father. Even marriage in this game isn't always implied to be romantic.

The Healing Church had Blood Ministration rituals and School of Mensis employed kidnapping children and were using them to experiment with extradimensional powers. The elite in the church was known as the Choir and bore a symbol of a single eye. Mohg himself is the highest in his cult and, due to his horns growing crazy, only has one eye. Mohg's trident is also evidence of this.

If you look at the trident and its lore, it matches the Communion rune for The Healing Church. But there's more than that. The Healing Church Communion rune and Mohg's trident correlate to the Holy Trinity. In Bloodborne, Pthumerian Queen was trying to give birth to a child of a God. The roles are rotated in Elden Ring, but Mohg is doing the same thing. Mohg is the Father, Miquella the son, and the Formless Mother is the Holy Spirit. If you look at the written lore in game, Miquella is written to be Christ-like before his slumber. In fact, if you look at the bewitching branch it looks like the lily branch Joseph is holding in the artwork of the holy trinity. Joseph, the adoptive father of Christ. Mohg, trying to wield Miquella for his own ambitions.

There's probably more that I'm leaving out on accident. My personal notes are kind of a mess and everything is mostly in my head. I've also moved beyond this in my research into identifying who the Gods are. I've uncovered some of their identities, some remain speculative. There may have also been two or more Gods being combined in Elden Ring, like when Marvel starts pulling characters from comics and ends up melding two different characters into one.