I am guessing jens since j was the most common heading alphabet for replacing i as a first letter.
Addendum for clarity: One of New Latin's nominations was the adjustment to spelling of certain words, and the negation of conventional orthography. This was done with the wholesome intent of smoothing the loan into an established and standardised Middle English (the latter word being unascribable to Old English).
One of these dictates was that i ought to be relinquished and replaced with letters that could be better pointers to pronunciation. This was mostly in words that commenced with i, but was sometimes expanded to compounds. By my knowledge, the letter j was used as the replacer in the vast majority of cases (with g being second). There may be other letters used for this caste's replacement that I am unaware of.
Since eo had heavy employment in Latin (and so must have featured dominantly in its medieval revival), the word must have been remorphed during this period by the set laws (of which I do not profess complete knowledge of). So I would like to know either what the word's spelling was transformed to, or what would have been the most likely transformation in heed of New Latin's scholarly workings/methodology?