Suo-Gan
Gently Sleep is also known as Suo Gan, it is a Welsh lullaby that was first printed in 1800. The song's title simply means lullaby (suo = lull; cân = song). I have seen it in print as Suo-Gan for many years.
Chris Caton-Greasley LLCM(TD) MA (Mus)(Open)
Ethnographic Musicologist, Teacher, Researcher