I also have Fearons from Rosstrevor. Mine is a John Fearon who married Elizabeth Crawford. He was actually born in Warrenpoint which is just next to Rosstrevor, in abt 1826. He married Elizabeth in 1853. They lived for some time in Scotland and Liverpool and then went back to Rosstrevor, where I found them on the Ireland 1901 census. I think there may be children to the couple you mentioned on the IGI. (This can be found on familysearch.org, in the 'search for ancestors'option.) It is sometime since I looked but the names seem familiar, although I haven't as yet tied them in to my Fearons. There are lots of Fearons in Rosstrevor and Warrenpoint on the 1901 census. If there is any other way I can help please let me know.