Where does “malwyr” come from?

malwyr (Welsh) comes from Welsh ŵyr, from Middle Welsh wyr — Soft mutation of gwyr.

Ancestry of “malwyr”, step by step

malwyr traces back through two separate lines of ancestry.

via Welsh ŵyr

StepLanguageWordMeaning
1WelshŵyrSoft mutation of gŵyr; grandson, grandchild
2Middle WelshwyrSoft mutation of gwyr

via Welsh malu

StepLanguageWordMeaning
1Welshmaluto grind
Every word from Middle Welsh wyr →Every word from Welsh ŵyr →