←
Proto-Celtic *samos (cognate)
←
Persian هامین (cognate)
←
Proto-Indo-European (mention)
←
Proto-Indo-European *semh₂- (inherited)
←
Russian ле́то (mention)
←
Old Armenian ամ (cognate)
→
Armenian ամառ (mention)
→
Old Irish sam (cognate)
→
Old Armenian ամ (mention)