The surname mcclement/mcclements is a scots/irish name related to the clan lamont of scotland. The family would have their crest and motto threw the clan.I have been researching the family name for awhile now and have found nothing of a family crest,etc. in the family name alone. You can find plenty of info on the clan,on the net.You can also get some info on the family by going to the irish times on the net and clicking on ancestors. I hope this helps you .