r with dot below is defined as a combined glyph: http://www.fileformat.info/info/unicode/char/1e5b/index.htm  Similarly r + line below.  

But ring below is - as you observe correctly - not in the unicode standard as a single glyph.  See, e.g., this list.  The letter r + ring below is, as others have said, still fully achievable and fully Unicode, but it has to be rendered with a combination of the two glyphs r and the non-spacing ring below.

The canonical list of names from the Unicode website is here: http://unicode.org/charts/charindex.html .  Search for "ring below" to see what is, and what isn't available.



Professor Dominik Wujastyk

Singhmar Chair in Classical Indian Society and Polity

University of Alberta, Canada

South Asia at the U of A:

On 16 January 2017 at 08:22, Gruenendahl, Reinhold via INDOLOGY <indology@list.indology.info> wrote:
Dear list members,
I would be much obliged for any information concerning the current HTML definitions for (vocalic) r, R, l, and L, long and short, with underring (not underdot).
The definitions I found some years ago (e.g., &#59444; for R-underring and &#59445 for r-underring) do not seem to be valid anymore.
I have searched Alan Wood's site, but in vain.

Thanks in advance
Reinhold Grünendahl

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