Thank you for the GV article links, but after reading them it seems that the terms/style I am having trouble with are specific to the rate book. I have never come across a document like this where people were referred to as "Mc" as part of their first name, and so I am assuming that whatever was being done with the rate book was specific to it. For example, the three Markeys would appear to be related, but why would one be referred to as McPatt if his name was actually Patrick/Patt? If "Mc" was meant to mean "son of Patrick", then I would think that the creator would just use the man's actual name (fyi, no other Patrick Markey / senior appears in the townland).
I think Josey is right about the "farrick" term as there are two James McMahons in the townland I pulled the extract from (fyi, the other just says "James McMahon"). I have no idea what "farrick" means though, and an internet search for once isn't turning up anything. If the author was using this term to differentiate a father from a son, then that would probably mean that multiple appearances of a name like "Robert Eccles" would be referring to a single person associated with multiple parcels of land. Does anything know if that word really means father/son or was some other type of now-obsolete reference?