I had also read that there was a house called Lanahrone House in the area before it became an estate which might explain Lanahrone Avenue and there is also a townland called Lanahrone nearby in Co. Clare.
You're right about the house. The osi website now has the 25" (late nineteenth/early twentieth century) maps online, as well as the earlier 6" maps, and there is a house on the site, called Albert Villa on the earlier map, and Lanahrone on the 25" map. You can do an overlay of the modern street map over one of the historic maps, which is pretty nifty. Unfortunately the historic maps don't seem to have their survey dates attached, which would be useful.
I tried to attach a screen grab, but do not have the skills or the patience.