"Rest in peace" is "Gorffwys mewn hedd".
'(May they) rest in peace' would be:Corffwys mewn heddorYn gorffwys mewn hedd.
Gorffwys mewn hedd
Gorffwys mewn hedd nain a taid. (northern Welsh) Gorffwys mewn hedd mamgu a tadcu. (souther Welsh)
Heddwch is peace in welsh
The Welsh word for "peace" is pronounced "heddwch." It is phonetically pronounced as "heth-oo-ch."
welsh = tŷ o heddwch
In Welsh, "peace be with you" is said as "heddwch fydd gyda chi." The word "heddwch" means peace, "fydd" means be, and "gyda chi" means with you. This phrase is commonly used as a greeting or farewell in Welsh-speaking communities.
Rest in peace
peace and happines
Thlalani Gahle
samadhanathil vishramikuvin = Rest in Peace