I am a little bit confused. Confusus sum paulum, mi Adriane... :?
G.M.Lane, 692 says:
quisque, quaeque, quicque, quidque or quodque. Sometimes unus is prefixed: unus quisque. Both parts are declined. quisque and quemque are sometimes feminine.
Allen & Greenough, 151.f say:
quisque is declined like the interrogative quis, qui. - substantive quisque, quidque, adjective quique, quaeque, quodque.
In the compound unusquisque both parts are declined (gen. uniuscuiusque) and some times written separately and even separated by other words [...]
Lewis & Short Lexicon says:
quis-que, quaeque, quodque, and subst. quicque (quidque), pron. indef., [...]
So, there is nothing about quique as nom. m. sing. used adjectively, either in Lewis & Short or in G.M.Lane. Only A & G say that there is a nom. singular quique...
So there is a dispute about unusquisque-unusquique also... Does the form unusquique exist at all as nom. m. sing?
What is your opinion Adriane? Quid opinaris, Adriane?
Could we perhaps search in some other books? Possimusne fortasse in aliis libris grammaticis aut dictionariis scrutari? Scisne in quibus?
Dives qui sapiens est...