welsh translation please

[yucker j]

defffo maen duydd y-ddraig.goch ddyry.cydmwyn c,c,f.t inscription on teaset ,thank you in advance,

[Metz]

have a look here http://www.translation-guide.com/free_online_t ranslators.php?from=Welsh&to=English

[kempie]

The Welsh national motto "Y ddraig goch ddyry cychwyn" translates as "The Red Dragon inspires action" or "...advances" or "...leads the way".

Are you sure maen duydd is accurate?