I'm looking for information related to Robert Lightbody, born circa 1841 in CO. Down Ireland. He moved to Liverpool and married Sarah Lightbody (nee Cunningham) and they had upwards of ten children, including their youngest, my great-grandfather Alfred Isaac Lightbody.

Specifically, I'm looking to find Robert's parents. I'm having trouble finding Robert before 1881, when he was listed as living in his mother-in-laws house in Liverpool.