Where does “mac-peathar” come from?

mac-peathar (Scottish Gaelic) comes from Scottish Gaelic piuthar, from Old Irish fiur, from Proto-Celtic swesūr, from Proto-Indo-European swésōr, from Proto-Indo-European su-h₁ésh₂-ōr, from Proto-Indo-European h₁ésh₂r̥ — blood.

mac-peathar (Scottish Gaelic): sororal nephew

Definitions

  1. sororal nephew

Ancestry of “mac-peathar”, step by step

mac-peathar traces back through two separate lines of ancestry.

via Scottish Gaelic piuthar

StepLanguageWordMeaning
1Scottish Gaelicpiutharsister, female sibling
2Old IrishfiurLenited form of siur
3Proto-Celticswesūrsister
4Proto-Indo-Europeanswésōrsister
5Proto-Indo-Europeansu-h₁ésh₂-ōr—
6Proto-Indo-Europeanh₁ésh₂r̥blood

via Scottish Gaelic mac

StepLanguageWordMeaning
1Scottish Gaelicmacson; Commonly used as a prefix of Irish and...
2Middle Irishmacson
3Old Irishmaccson; child
4Primitive IrishᚋᚐᚊᚊᚔAlternative form of ᚋᚐᚊᚔ
5Proto-Celticmakkʷos—
6Proto-Indo-Europeanmeh₂ḱ-to raise, increase; long
Every word from Proto-Indo-European h₁ésh₂r̥ →Every word from Proto-Indo-European su-h₁ésh₂-ōr →Every word from Proto-Indo-European swésōr →