Question: when did the letter j appear in the alphabet
Answer: Gian Giorgio Trissino ( 1478 -- 1550 ) was the first to explicitly distinguish I and J as representing separate sounds , in his Ɛpistola del Trissino de le lettere nuωvamente aggiunte ne la lingua italiana ( `` Trissino 's epistle about the letters recently added in the Italian language '' ) of 1524 .