Where does “Strathisla” come from?

Strathisla (English) comes from English strath, from English Strathclyde, from Scottish Gaelic Srath Chluaidh, from Scottish Gaelic srath, from Old Irish srath, from Proto-Celtic stratos, from Proto-Indo-European str̥h₃tós, from Proto-Indo-European sterh₃- — sterile, infertile.

Ancestry of “Strathisla”, step by step

Strathisla traces back through two separate lines of ancestry.

via English strath

StepLanguageWordMeaning
1EnglishstrathA wide, flat river valley
2EnglishStrathclydeA former local government region in the west of Scotland, created in 1975, abolished in 1996
3Scottish GaelicSrath ChluaidhStrathclyde, former local government region in the west of Scotland
4Scottish Gaelicsrathriver valley; low-lying or flat part of a valley...
5Old Irishsrathgrass, grassy place; grassland
6Proto-Celticstratosvalley
7Proto-Indo-Europeanstr̥h₃tósstretched, spread
8Proto-Indo-Europeansterh₃-to spread, extend, stretch out
9Proto-Indo-Europeanster-sterile, infertile

via English Isla

StepLanguageWordMeaning
1EnglishIslatributary to the Tay
2Spanishislaisland; block
3Old Spanishisla
4Vulgar Latinisula
5LatinĪnsula
6Proto-Italicenselā
Every word from Proto-Indo-European ster-Every word from Proto-Indo-European sterh₃-Every word from Proto-Indo-European str̥h₃tós