The correlatives manan or man “when” appeared in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 (PE23/109), a combination of interrogative ᴹQ. ma and ᴹQ. -n(an) “time”.
Neo-Quenya: For purposes of Neo-Quenya I would stick to ᴹQ. mallume, since I think -n(an) was abandoned.
A term for the dialect of Qenya spoken in the house of Ingwe appearing in linguistic notes from the 1930s (LR/172, 193), it is simply a combination of the name of the Elf-lord prepended to the language.