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Old Norse hamarr
← Old English hamor (cognate)
← German Hammer (cognate)
← English hammer (cognate)
← West Frisian hammer (cognate)
← Proto-Germanic *hamaraz (inherited)
← Old High German hamar (cognate)
← Proto-Indo-European *h₂eḱ- (root)
← Proto-Indo-European *h₂eḱmoros (derived)
← Proto-Indo-European *h₂éḱmō (mention)
← Low German Hamer (cognate)
← Old Frisian hamar (cognate)
← Old Saxon hamar (cognate)

→ Old English hamor (cognate)
→ Danish hammer (derived)
→ Faroese hamar (inherited)
→ Westrobothnian hammar (inherited)
→ Old Swedish hamar (inherited)
→ Old High German hamar (cognate)
→ Icelandic hamar (inherited)
→ Latvian āmurs (borrowed)
→ Norwegian Bokmål hammer (derived)
→ Norwegian Bokmål hammar (derived)
→ Norwegian Nynorsk hamar (derived)
→ Norwegian Nynorsk hammar (derived)
→ Old Saxon hamar (cognate)
→ Swedish hammare (inherited)