Author: Iago Blaenrhondda; Rev. H. W. GriffithHymnal: CMSP1918 #299 (1918)First Line: Cydunwn blant bychain i ganu (Unite, little children, in singing of Jesus)Refrain First Line: Am hyny cydunwn i ganu (Unite, little children, in singing)Languages: English; WelshTune Title: [Cydunwn blant bychain i ganu]