Regarding Jeffers, one clue to this name, which is not as far as I know a local one,
In Tralee there was a boys school named
The Jeffers Institute.
Its location was Moyderwell Tralee.
You could try writing to the Kerry County Library,
Moyderwell, Tralee, for information on it.
The location of the Library is on or near the old
Jeffers Institute., if my memory serves me.
The Institute goes back to late I89Os, not sure when it closed its doors though.