I seem to remember a version of Young Rambleaway which had a verse

"As I went a-walking to Derrydown Fair
I spied pretty Nancy a-coiling her hair . . . "

The Coal Owner and the Collier's Wife, from the singing of Harry Bordman (RIP) had the refrain 'Derry down, down, down derry down'

It has been observed that tis is not an uncommon refrain, chorus.