A word appearing as ᴱQ. piopin or pipin in the Qenya Lexicon of the 1910s glossed “the fruit of hawthorns, haws”, apparently a combination of ᴱQ. pio “berry” and ᴱ√PINI “*small” (QL/74). Both piopin and pipin appeared in the contemporaneous Poetic and Mythological Words of Eldarissa with the gloss “haws” (PME/74).

Neo-Quenya: I’d retain ᴺQ. piopin for purposes of Neo-Quenya for the fruit of hawthorns, since there is evidence that *√PI(N) “little” survived in Tolkien’s later writing.