The word ᴱQ. hilmi “family, offspring” appeared in the Qenya Lexicon of the 1910s as a derivative of the early root ᴱ√HILI (QL/39). In the contemporaneous Gnomish Lexicon, the word hilmie was given as the Qenya cognate of G. hilm “posterity, one’s descendants, progeny, offspring” (GL/49).

Neo-Quenya: I would adapt this word into Neo-Quenya as singular ᴺQ. hilmë “offspring, *descendant”, and use plural hilmi to refer to the entirety of one’s extended family, including all descendants. Among the Elves, the original ancestor would still be alive and able to interact with their descendants of all generations, so this would be a living rather than historical relationship.