kiernae
kiernae is a term that can refer to several different things, depending on the context. In some regional dialects of English, particularly in Ireland, kiernae may be used informally as a term for a child or young person, sometimes with a slightly mischievous or impudent connotation. This usage is not standard and its prevalence varies greatly.
Beyond this colloquial understanding, "kiernae" does not appear to be a recognized term in mainstream English