HEBREW HE-WITH-ADNY-INSIDE

[Mark E. Shoulson]

Looking waaaay back to my opus (with Michael Everson) of 1998, 
http://std.dkuug.dk/jtc1/sc2/wg2/docs/n1740/n1740.htm, I call to 
attention one particular case mentioned there: the case where the second 
HEBREW LETTER HE of the Tetragrammaton is made very wide and another 
Holy Name (Adonay, ALEF-DALET-NUN-YOD) is printed in smaller letters 
inside it.  As mentioned last century, this is even now (well, then) 
commonly met with, especially in Sephardic prayer books.

I mention it because I've found a bunch of professional Hebrew fonts 
which have a glyph for this special character.  Take a look at any one 
of many (but not all) of the offerings of the Samtype Foundry at 
https://www.myfonts.com/collections/samtype-foundry and you'll see what 
I mean.  Sometimes it's visible in the sample image, sometimes it isn't 
even though it's in the font.  They seem to be placing the glyph at 
codepoint U+FB50, which is ARABIC LETTER ALEF WASLA ISOLATED FORM, 
probably because it's the next character after the extended Hebrew 
code-block that ends at U+FB4F HEBREW LIGATURE ALEF LAMED and because, 
being in an Arabic codeblock, it has RTL directionality (while the PUA I 
think has LTR directionality, which is most inconvenient.)

So it seems that this really is a thing being used by typefounders even 
now.  Probably should be encoded, yes?  My rationale from 1998 of 
encoding the Tetragrammaton as a glyph in itself was apparently not 
accepted, though after a later paper, 
https://unicode.org/L2/L2015/15092-hebew-nomina-sacra.pdf and some 
discussion, the YOD TRIANGLE U+05EF was encoded.  Perhaps this should be 
too?  I guess as a variant of HE perhaps?  (the name in the 
subject-header is not meant as a serious proposal for the glyph-name, 
though this letter is actually serious, despite the date.)

~mark