 Members of Scottish clans show their allegiance to their clan and chief by wearing crest badges . These are usually worn on a bonnet . Crest badges are usually made up of the chief 's heraldic crest surrounded by a strap and buckle with the chief 's heraldic motto or slogan . The crest badge used by members of Clan Maclachlan contains the Latin motto <unk> ET <unk> , which translates to " strong and faithful " . The blazon of the crest within the badge is ( <unk> from a crest coronet of four ( three visible ) strawberry leaves Or ) a castle set upon a rock all Proper . Another clan symbol used to show a clan member 's affiliation is a clan badge or plant badge . Consisting of a particular plant , these badges are sometimes said to be the original means of identification used by Scottish clans . Clan Maclachlan has two clan badges attributed to it . These include : rowan ( or mountain ash ) and lesser periwinkle . 
