"Dyma gariad fel y moroedd" is the Welsh version of the hymn "Here is
love, vast as the Ocean". You can find the English version in the
"Redemption Hymnal" - a rather old-fashioned collection of hymns these
days- it is hymn number 85 in my copy and we used to sing it a lot in
the Pentecostal church back in the 1980s. The author of the English
words is given as H. Smart, there are four verses, and it is sung to the
tune Ebenezer (Ton y botel) or Bethany.
Redemption Hymnal was first published in 1951 by Kingsway Publications,
no ISBN number.
Blwyddyn Newydd Dda - Happy New Year