The Welsh National Book of Remembrance for the First World War contains the names of 35,000 servicemen and women, as well as members of Welsh Regiments, who lost their lives in the First World War. These individuals are listed according to regiment and battalion alongside the names of those who might well have died alongside them.

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