I learned this song from William Cole's 'Folk Songs of England, Ireland, Scotland and Wales', a book you may find in your public library. The song has only two verses, and the lover is called Phelemy Diamond. I've changed Phelemy to Jeremy, because people recognize Jeremy as a name, while Phelemy creates the impression we are talking about a fella-me-diamond.

Several years ago we visited a churchyard in Bantry, Ireland, and noticed the huge pines festooned with ivy. The version I sing has the line

"sitting under an ivy tree"

and having seen trees cloaked in ivy, I feel comfortable singing it that way.
==========
'Tis pretty to be in Ballinderry
'Tis pretty to be Aghalee.
'Tis prettier to be in Bonny Ram's Island
sitting under an ivy tree.

Ach hone, ach hone (however you spell that.)

Oh that I were on Bonny Ram's Island.
Oh that I were with my Jeremy Diamond.
He would whistle and I would sing
till we would make the whole island ring.

Ach hone, ach hone
=============================
This makes a lovely tune for the fretted dulcimer. I keep repeating the notes for "ach hone, ach hone" more and more softly, to sound like distant church bells. The DT page has the sheet music for this.