Where does “ffordd haearn” come from?
ffordd haearn (Welsh) comes from Welsh haearn, from Middle Welsh haearn, from Proto-Brythonic hiyarno-, from Proto-Celtic īsarnom, from Proto-Indo-European h₁ésh₂r̥ — blood.
ffordd haearn (Welsh): railway
Ancestry of “ffordd haearn”, step by step