Mae Llyfr Cofio Cenedlaethol Cymru o'r Rhyfel Byd Cyntaf yn cofnodi enwau 35,000 o filwyr , yn ddynion a merched o Gymru ynghyd ag aelodau o gatrodau Cymreig, a gollodd eu bywydau yn y Rhyfel Byd Cyntaf. Rhestrwyd yr unigolion yma fesul catrawd a bataliwn ochr yn ochr ag enwau'r rhai a allai'n hawdd fod wedi marw gyda nhw.

First Battalion; Second Battalion; Fourth Battalion; Fifth Battalion; Seventh Battalion; Eighth Battalion; Ninth Battalion; Tenth Battalion; Eleventh Battalion; Twelfth Battalion; Thirteenth Battalion; Seventeenth Battalion; Twentieth Battalion; Twenty-first Battalion; Twenty-second Battalion; Twenty-third Battalion; Twenty-fourth Battalion; Twenty-fifth Battalion; Twenty-sixth Battalion; Thirty-second Battalion; Thirty-eighth 39th & 40th Battalion (Jewish); Forty-third Garrison Battalion; Forty-fifth Battalion; Posted Second 2nd London; Posted Third London Regiment; Posted First 4th London Regiment