Welsh ffroen

← Proto-Brythonic *froɨn (inherited)

← Proto-Celtic *srognā (inherited)

→ Breton fri (cognate)

→ Welsh trwyn (mention)

→ Welsh ffroenuchel (compound)

→ Irish srón (cognate)

→ Scottish Gaelic sròn (cognate)

→ Manx stroin (cognate)

→ Old Irish srón (cognate)