From what I've found from Google searches, it sounds like the Alexander
Hassard who died in 1845 was a veteran of Waterloo, which he survived
despite being badly wounded. His name popped up as a Justice of the Peace,
before before whom a number of Cavan landowners appeared to present a
petition to Parliament seeking a workhouse at a more convenient location
Also, Alexander was married to one Elizabeth Bolton, who herself was a
Hassard (to what degree of consanguinity is unclear). I don't know whether
that was Alexander's only marriage, but it's possible that this Elizabeth
was his widow, who later remarried to Rupert John Mackintosh.
Alexander, Anne. Elizabeth, and Arabella were almost certainly minors who
had to be represented by a next friend in the lawsuit. It's a possibility
that they were the issue of Alexander and Elizabeth. I don't know whether a
next friend had to be a male during this period; if so, that could explain
why Rupert (and not Elizabeth) was so named.
Unfortunately, the 1922 Four Courts explosion pretty much destroyed all
pre-1858 Exchequer Court records. Unless a fragment survives somewhere, we
may never know the ultimate resolution of the lawsuit.
-- Kevin à