Conceptual Development: In the earliest Lost Tales, his name was ᴱN. Cranthor (LT2/241). Tolkien change his name to Cranthir in the Lays of Beleriand from the 1920s (LB/80) and this was also his name in Silmarillion drafts from the 1930s (LR/223). N. Cranthir appeared in The Etymologies with the translation “Ruddy-face” (Ety/KARÁN, THĒ), already with essentially the same etymology as its final version.
In Silmarillion revisions from the 1950s-60s, Tolkien vacillated between Cranthir and Caranthir, ultimately settling on the latter (WJ/115).