←
Old Church Slavonic ловъ (cognate)←
Ancient Greek λέων (cognate)←
Proto-Indo-European *luheh₂ (inherited)←
Proto-Tocharian *lŭwā- (inherited)←
Serbo-Croatian lȏv (cognate)←
Tocharian A lu (cognate)→
English louse (cognate)→
Tocharian A lu (cognate)