lualatex makeindex : can I change the font ?

[Ken Moffat]

I'm guessing this has been discussed somewhere in the past, but
gurgle is giving me a lot of noise and links for macOS or the online
way of writing LaTeX.

Years ago (2016 orearlier), when I thought (from reading online) that
pdflatex was a good way to go, I created an essay using pdflatex,
bibtex and makeindex.  I am now tring to update that (modern
historical sources, including archaeology, suggest the myths
promulgated by Anglo-Saxon clerics such as Bede for the years before
he lived are "double plus unreliable", as is much of the later
Anglo-Saxon Chronicle.

So, a lot of editing needed.

When I used pdflatex I could use \textsc{} for names, particularly
personal names (to help distinguish them from placenames, which were
my original subject). I much prefer the open 'g' of DejaVu Serif, but
that lacks a small cap font.  Is it
practical for me to specify a different font for Small Caps, both in
makeindex and in the main text ?

TIA

ĸen
-- 
  'The universe is so big, sir, that it obeys all possible laws,'
  said Ponder, 'For a given value of "teapot".
           -- The Science of Discworld II, 'The Globe'