Welsh llen

← Breton lenn (cognate)

← Gaulish linna (cognate)

← Proto-Celtic *linnā (inherited)

← Irish leann (cognate)

← Cornish len (cognate)

← Old Welsh lenn (inherited)

← Middle Welsh llenn (inherited)

→ Breton lenn (cognate)

→ Welsh rhaglen (affix)

→ Welsh amlen (affix)

→ Welsh taenlen (affix)

→ Welsh breinlen (affix)

→ Welsh croglen (compound)

→ Welsh amserlen (compound)

→ Irish leann (cognate)