More probably a font-transliteration issue. J in Wingdings is a smiley. I often see it in Outlook emails received in Thunderbird where the sender typed a smiley

More probably a font-transliteration issue. J in Wingdings is a smiley. I often see it in Outlook emails received in Thunderbird where the sender typed a smiley, outlook converted it to a Wingdings smiley, then it got converted into plain ASCII.