If X=Xristus and O=Omnipotens (and first "R"=visual pun), we could also read [In] Nomine Domini Xristi, Omnipotentis Xristi, CHristi, Wictoriam Deo, CHristo Domino, Xristo Omnipotenti RogaVI. In the Name of Christ Our Lord, Christ Almighty, Christ, for victory to God, to Christ Our Lord, to Christ Almighty I prayed. But I have my doubts about the same word being represented with two different initials (and not once), especially if we consider van Hasselt's evidence about XOX and DXO. In the Name of God, the Trinity and Christ, for victory to God, Christ and the Trinity I prayed: this sounds more symmetric and lapidary to me.

Or XOX & DXO refer to the Trinity, =trinitatis & trinitati.

Here my humble opinion. Accepting van Hasselt's idea that XOX and DXO refer to the Holy Ghost, the inscription might read: [In] Nomine Domini XOX (=Spiritus Sancti) CHristi, Wictoriam DomiNo CHristo DXO (=Spiritui Sancto) RogaVI I read the mysterious central "R" as an "N", different from the first one because it is not an initial. Another possibility: it is just a visual pun; in that case, both D's could be God, Dei & Deo. Letter "W" could have been used by mistake to represent the latin semivowel "u" or "v": the inscriber is a germanic-speaking person who uses "W" for the same sound in his every day life (might even have the word "win" in mind, common to english, dutch, german...). Enrique Morales Lara, PhD in Classical Philology.