Cillín is a variant of the name Cillian, which is of Irish origin. The name Cillian itself is derived from the Gaelic word 'ceallach', meaning 'war' or 'strife'. In a broader cultural context, a cillín (plural cillíní) refers to a historic burial site in Ireland, primarily used for stillborn and unbaptized infants. These sites were also designated for individuals who were not permitted burial in consecrated churchyards, including the mentally disabled, suicides, beggars, executed criminals, and ...