ゟ is a digraph that is read より. Where does it originate from?
Is it a ligature, like
& <- et, or German
ß <- ſs -> ss? (Wikipedia claims this, citing no source.) Also, if it is a ligature, what did the ligation process look like (e.g. what are the intermediate forms between
Alternatively, could it be a derivative of
与 or another kanji? (Another non-authoritative source which I have now lost track of claims this.)