"Ledhithon ir phenin vellon." and the rest of the "-itha"s in 6.3 needs fixing.

Argh, a few always slip through. Thanks for spotting those.

+Fiona Jallings Have you decided to stick to the m/nc conjugational system for a while? I thought we can now reconstruct the system corresponding to the omentielvo shift fairly well:

1sg. -on (attested)
2sg. form. -ol (attested)
2sg. Dor. -odh
2sg. fam. -og
3sg. -a

1pl. excl. -of (attested)
1pl. incl. -ab (attested)
2pl. form. -alir
2pl. Dor. -adhir
2pl. fam. -agir
3pl. -ar

Doriathrin, normally with reduplications:
1du. excl. -am (*1du. incl. -aph (*2du. form. -adhad ??
2du. fam. -ach (kke)
3du. -ast (dissim. tte)

This would also point to a tentative pronominal set:
Ni, Le, Dhe, Ge, De; Ve, Be, Li, Dhi, Gi, Di.

Yeah, I'm sticking with -m/-nc for now. I focus on LotR-era style Sindarin,  so I use the chart from PE17 page 132.

+Fiona Jallings Then you should redo the Quenya Pronouns section back into LotR-compatibility as well. Showing -lme there but -n in Sindarin is counterlogical.
I just opened the chart; you can add ma 'one, a thing' now.

The fact is, the chapter in PE 17 is the best, most complete chart of Sindarin pronoun-suffixes. For Quenya - I'm not an innovator. I go with what I find others using most often.

+Fiona Jallings Honestly, I don't believe this chart from PE17 is the most concise. In fact, being just a jotting of inflexions without any supporting deductions, it can easily be but an experimentation. Tolkien noted himself that 'Sindarin had lost the Common Eldarin (CE) distinction between ’we’ Pl. 1a exclusive of the person(s) addressed, and 1b inclusive. But the causes of the confusion were mainly phonetic' (PE17:129), that is, ngwe > mbe > m word-finally in Sindarin, the two forms coincide and there is no actual way to explain nc. (Unless it is borrowed, but then the Doriathrin appearance is even trickier.) Anyway, I don't believe that the same site should provide -mme for Quenya 1 dual and -m for Sindarin 1 plural; these are from quite different conceptual stages.

Actually, I think -nc is from ni+ki, like the Quenya suffix -nce.
ETA: Hunted down the reference - it's VT49/51.

+Fiona Jallings I'm not persuaded still. Such a derivation rather leads to expect a dual form, 'you and I', without others included; even more, such "games" with consonants seem to be Ñoldorin type of enjoyment and their appearance in Sindarin would indeed be strange especially -ngid. Thingol accepting a form Maedhros showed to him and making a dual of his own? Also the id dualities; knowing the ad suffixation to be from postposed atta (PE21), I cannot explain those well enough.

The dual suffix likely is just -t.  the I and A are remnants of the ancient ends of the words, preserved by the added consonant.

+Fiona Jallings 'The elements ta, tta are clearly only reduction of the normal numeral element for 'two'. Originally they could only appear in nouns, and were distinguished from the others in function, being a parallel to the partitive or indefinite plural: see above. That is: originally in CE appeared, say, talu 'a pair of feet' of one person; but eledā'ta, eledatta 'a couple of Elves'' (PE21:73)

+Fiona Jallings Great site!  But it is so hard to give definite answers about Sindarin, as you've pointed out yourself. I'd personally be very interested for a more in-depth discussion about your extrapolated grammar, because of the many very interesting theories you have on mutation, pronouns and syntax. :)

+Александр Запрягаев And couldn't be ni>-on, ci>-og, me>-of, *pe>-ab?

+Remi Korben That's what I meant. However all personal pronouns are for some reasons lenited in attested texts so I performed that from the start. The matter of final vowels in them and their correspondence to the peculiar a/o-distribution is to be yet settled.

Hey, +Fiona Jallings I am getting an error (database error) when trying to access your page

+Tamas Ferencz  Weird, it's working fine for me. What page are you having trouble accessing?

+Fiona Jallings
any of them - but now it's back. Sorry for the false alarm!