Where does “Langhowm” come from?

Langhowm (Scots) comes from Scots lang, from Middle English lang, from Old English lang, from Proto-West Germanic lang, from Proto-Germanic langaz, from Proto-Indo-European dlongʰos — long.

Ancestry of “Langhowm”, step by step

Langhowm traces back through two separate lines of ancestry.

via Scots lang

StepLanguageWordMeaning
1Scotslanglong
2Middle Englishlang—
3Old Englishlanglong; lasting; old, ancient; advanced
4Proto-West Germaniclanglong
5Proto-Germaniclangazlong
6Proto-Indo-Europeandlongʰoslong

via Scots howm

StepLanguageWordMeaning
1Scotshowmlow-lying ground beside a river
2Old Norsehólmrisland
3Proto-Germanichulmazsmall island, hill, mound
4Proto-Indo-Europeankl̥Hmos—
5Proto-Indo-EuropeanḱelH-to freeze
Every word from Proto-Indo-European dlongʰos →Every word from Proto-Germanic langaz →Every word from Proto-West Germanic lang →