My MANNIONs have various spelling including MANYON etc.
Literacy caused several problems
One person who may be of interest is here -
LINKPatrick s/o Patrick MANNION, a Shepherd; and Catherine nee MANNION b Jan 18 1876
There is a baptism transcribed in the same area on Jan 23 1876
Many people at that time used their baptism details as well as their civil records for birth dates
I am checking out where the original of the baptism record is located as the transcription does not link correct and an initial search didn't find him. I'll update when I know more.