Where does “tad-cu” come from?

tad-cu (Welsh) comes from Welsh cu, from Middle Welsh ku, from Proto-Brythonic kʉβ̃, from Proto-Celtic koimos, from Proto-Indo-European ḱóymos, from Proto-Indo-European ḱey- — to be lying down; to settle.

tad-cu (Welsh): grandfather

Definitions

  1. grandfather

Ancestry of “tad-cu”, step by step

tad-cu traces back through two separate lines of ancestry.

via Welsh cu

StepLanguageWordMeaning
1Welshcudear, beloved
2Middle Welshku—
3Proto-Brythonickʉβ̃dear, nice
4Proto-Celtickoimosdear, nice
5Proto-Indo-Europeanḱóymosof the home, belonging to the family; village,...
6Proto-Indo-Europeanḱey-to be lying down; to settle

via Welsh tad

StepLanguageWordMeaning
1Welshtadfather
2Middle Welshtad—
3Proto-Brythonictadfather
4Proto-Celtictatos—
Every word from Proto-Indo-European ḱey- →Every word from Proto-Indo-European ḱóymos →Every word from Proto-Celtic koimos →