Some consider this the Great Mormon Hymn. The poem was written by Eliza R. Snow. It was early and popular as it has continued, expressing LDS belief in a Mother in Heaven. I'm glad it was in the Welsh Hymnal of 1852.
LDS HYMNAL ENGLISH TO WELSH HYMN
HYMNAU SAESNEG I'R GYMRAEG
1. The Morning Breaks -- 1. Y Boreu DDaeth
10. Jesus, Lover of My Soul -- Iesu, Cyfaill F'enaid Cu
203. Angels We Have Heard on High, or Angels from the Realms of Glory -- Engyl glân o fro'r gogoniant
TRANSLATIONS FROM THE 1852 WELSH HYMNAL INTO ENGLISH