In _The Lord of the Rings: A Reader's Companion_ by Wayne
Hammond & Christina Scull, on p. 536 we find the newly revealed
unpublished note from Tolkien's _Nomenclature_ in which we read
about the name TARLANG:
"(...) [referring to the Mannish legend from White Mountains] The other
giants used his body to complete the wall at that point, but left his
neck lying southward, leading to the three mountains of the spur: _Dol
Tarlang_ 'Tarlang's Head', _Cûl Veleg_ 'Bigload' and _Cûl Bîn_ 'Little
I wonder what could be the etymology of Sindarin _bîn_ (unlenited
*_pîn_) 'little'? It is quite a new word for me. I find only Gn. _pî_
'anything very small; a bit, mote' and _pinig_ 'tiny, little' in the
Gnomish Lexicon (PE11:64). In the Quenya Lexicon there is an entry:
PIKI or PINI or PÎ
_pin_ or _pink_ 'a little thing, mite'
_pînea_ 'small' (PE12:73)
It's always wonderful for me to discover that some Sindarin words are
almost identical with the words from the so early "Gnomish Lexicon".
[I think you're certainly correct about the etymology of S. *_pîn_ 'little'.
QL also mentions that _-pin_ was used as a diminutive suffix, and this
can be seen in words such as Q. _piopin_ 'the fruit of hawthorns, haws'
< _pio_ 'plum, (berry), cherry', and _tolipin (d)_ 'mannikin' < _toli_
'doll, puppet' (PE12:74, 94). Also note that S. _cûl_ 'load' is evidently
from the same stem *_kol-_ 'bear, wear' seen in Q. _kolla_ 'borne,
worn, especially a vestment or cloak' (X:385 n. 19) and _Cormacolindor_
'Ring-bearers' (LR:953). For the phonology, cp. N. _mûl_ 'slave, thrall'
< *_môl-_, and N. _ûl_ 'odour' < *_ñôle_ (V:373, 378). -- PHW]