Month names collection / metastudy

[eggyk]

I'm also a bit surprised about the word-medial "j". Or "i with descender", if you wish. At a glance, it looks like this is the word-initial form.

Just above that there is a Roman numeral "xiij".  Perhaps "j" was just a graphic variant of "i"?

I had a look through, and could only find that specific curved 'j' at word beginnings, mainly for proper nouns like names. The j in numerals tend to be a straight descender. 

My best guess is that the writer more carefully wrote out each letter (for some reason) and used "capital" letters. Carefulness perhaps because 'aberil hat xxx tag' is a section title, or maybe because he was not familiar with the correct spelling for 'aberil' and had to write letter by letter?