Reconstruction:Proto-Celtic/knukkos

This Proto-Celtic entry contains reconstructed terms and roots. As such, the term(s) in this entry are not directly attested, but are hypothesized to have existed based on comparative evidence.

• *knekkos

Apparently cognate with Proto-Germanic *hnakkô (“the back of the neck; nape”), of uncertain further origin, but both are traditionally derived from Proto-Indo-European *kneg- or *knek-.^[1] It is sometimes suggested that the Germanic cognate is borrowed from Celtic (cf. especially German Hunke (“hillock”)). Alternatively, Kroonen argues for an inherited basis of the geminate cluster in the Germanic term, and that consequently the Celtic is more likely borrowed from Germanic.^[2][3] Compare Tocharian A kñuk (“neck”).

*knukkos m^[4][5]

1. protuberance; hill

Matasović's reconstruction *knokkos^[1] is probably erroneous for two reasons:

• *-okk- generally yields -och in Welsh, like in moch (“pig”) from *mokkus and broch (“badger”) from *brokkos. Conversely, -ukk- leads to Welsh -wch, as in swch (“ploughshare”) from *sukkos and bwch (“buck”) from *bukkos. Thus Welsh cnwch must indicate Proto-Celtic *knukkos, not *knokkos.
• Early Irish genitive singular cnuicc must contain an original root vowel *u; it cannot have arisen from the raising of an original -o- since such raising generally did not occur across voiceless consonants in Old Irish.

• Proto-Brythonic: *knox
  • Old Breton: cnoch
    • Middle Breton: knech
      • Breton: krec'h
  • Middle Welsh: cnwch
    • Welsh: cnwch, clwch
• Goidelic:^[6]
  • Old Irish: cnocc
    • Irish: cnoc
    • Manx: cronk
    • ⇒ Middle Irish: cnocán
    • Scottish Gaelic: cnoc
    • → Welsh: cnwc
    • → Welsh: cnwc