←
West Frisian simmer (cognate)
←
Middle High German sumer (inherited)
←
Middle Low German somer (cognate)
←
Old High German sumar (inherited)
→
Alemannic German summer (cognate)
→
Alemannic German Summer (cognate)
→
Alemannic German sòmmer (cognate)
→
Alemannic German ŝchumer (cognate)
→
Luxembourgish Summer (cognate)