f17r

[MarcoP]

Now, what is "allor" (or "Allor")? I guess in Italian it is the same as "allora" which means "back then".

What if we try to interpret the whole phrase in 15th century Italian? Marco, as a native speaker, do you have any ideas? (Mind that there could be proper nouns there!)

The main difficulty is that Italian words end with a vowel, these don't seem to do so.
In poetry, it was common to drop the ending vowel, so you can get "allor" for "allora" (then) "mal" for "male" (bad) etc. This sometimes happens in prose as well, but it is and was a comparatively rare phenomenon.

But the third word has a fairly common Latin abbreviation ("lucorum" -of the woods-, or less likely "lucem" -light- accusative).
As always, everything is possible, but I think it is easier to make sense of the words in Latin than in Italian.

[Added later, crossed with davidjackson, sorry]
One could also think of French / Spanish / Catalan / Provencal.
For instance "mullier" could be an alternative spelling for "mujer".
"Aller" is French.
Again, I have no alternatives for the third word.