A bit of additional information. My Mother-in-law comes from the Westport, Co Mayo area and moved to England when she was ~16. I believe she learnt the song whilst in Ireland so that makes it of the order of 65 years ago and possibly a Mayo song (?) if that is any help.

It is possible of course that the original does not use the name Sean, but I have searched on other phrases to no avail.

I accept that we are not going to get this for Wednesday, but in time for the Requiem Mass on the anniversary would be great.