Welsh llawr

← Breton leur (cognate)

← Proto-Brythonic *llọr (inherited)

← Proto-Celtic *ɸlārom (inherited)

← English floor (cognate)

← Irish lár (cognate)

← Cornish leur (cognate)

→ English floor (cognate)

→ Welsh lawr (mention)

→ Welsh banllawr (compound)

→ Welsh llorwedd (affix)

→ Irish lár (cognate)

→ Galician leira (cognate)

→ Old Irish lár (cognate)