Wherefore art thou, aberil?

[Koen G]

Tried to give it a go, searching for the "aberil" in random manuscripts, but couldn't find anything, i was even tracing variants like "ala-ril" and nothing. What is the best language to search for "aberil"? is it French?

As far as I'm aware, the exact form "aberil" hasn't been found yet, unless I'm missing something in the You are not allowed to view links. Register or Login to view.. (In which case, please let me know).

We're basically looking for two properties there:
* "b" instead of "p"
* insertion of vowel before "r"

When you focus on just one of those, various areas give some results. For example, I noticed that when looking for "augst", a lot of German MSS turned up, and those often had forms like "abriil", "abrille" etc. (Many different spellings). As shown, "b" occurs in Occitan as well, perhaps influenced by Spanish? 

Vowel insertion is most often "u", so something like "apuril". A quick glance at the spreadsheet suggests that this may be more common in more northern French dialects.