←
Proto-Indo-European *h₂éḱmō (mention)←
Old Norse hamarr (inherited)→
Icelandic hamra (affix)→
Icelandic hamra (mention)→
Luxembourgish Hummer (cognate)→
Norwegian Bokmål hammar (cognate)→
Norwegian Nynorsk hamar (cognate)→
Norwegian Nynorsk hammar (cognate)