Albanian katër

← Proto-Indo-European *kʷtur- (mention)

← Proto-Indo-European *kʷétur- (mention)

← Proto-Indo-European *kʷetwóres (mention)

← Latin quattuor (cognate)

← Lithuanian keturì (cognate)

← Serbo-Croatian četiri (cognate)

← Proto-Albanian *kátur (mention)

→ Albanian katror (mention)

→ Albanian katërshor (compound)