Where does “ar gau” come from?

ar gau (Welsh) comes from Welsh cau, from Welsh cael, from English Kyle, from Scottish Gaelic caol, from Middle Irish cáel, from Old Irish coíl, from Proto-Celtic koilos, from Proto-Indo-European sḱēy- — to cut, part, spearate, divide; to cut, part,...

Ancestry of “ar gau”, step by step

ar gau traces back through two separate lines of ancestry.

via Welsh cau

StepLanguageWordMeaning
1Welshcauto close, shut; to fasten; to heal, to close
2Welshcaelto get, receive, have; to get to, be allowed to,...
3EnglishKyleA placename
4Scottish Gaeliccaolthin, narrow; strait, narrows, firth, kyle; the...
5Middle Irishcáelnarrow
6Old Irishcoílthin, slender, narrow
7Proto-Celtickoilosthin
8Proto-Indo-Europeansḱēy-to shine; to shimmer; shadow; luster, gloss,...
9Proto-Germanicskaidąseparation, distinction
10Proto-Indo-EuropeanskÁit-to cut, part, spearate, divide; to cut, part,...

via Welsh ar

StepLanguageWordMeaning
1Welsharon; about to
2Middle Welsharon, upon; over, of; he/she who, whoever
3Proto-Brythonicarin front of; ploughing, ploughed land
4Proto-Celticarosploughing, ploughed land
5Proto-Indo-Europeanh₂erh₃-o-ploughing
6Proto-Indo-Europeanh₂erh₃-to plough
7Proto-Indo-Europeanh₁er-earth
Every word from Proto-Indo-European skÁit-Every word from Proto-Germanic skaidąEvery word from Proto-Indo-European sḱēy-