Items matching letterj taken from The Art of Illuminating As Practised in Europe from the Earliest Times (1860) (results page 1)
letterj: The letter “J” for example as a decorative initial or drop cap (drop capital letter)
Note that I and J were used interchangeably in older alphabets..
ABCDEFGHIJKLMNOPQRSTThUVWXYZ