Where does “bonnethead” come from?

bonnethead (English) comes from English head, from English -y, from Middle English -y, from Old English -iġ, from Proto-West Germanic -g, from Proto-Germanic -gaz, from Proto-Indo-European -ḱos — -y, -ic.

bonnethead (English): A form of hammerhead shark, "Sphyrna tiburo"

Definitions

  1. A form of hammerhead shark, "Sphyrna tiburo"

Ancestry of “bonnethead”, step by step

bonnethead traces back through two separate lines of ancestry.

via English head

StepLanguageWordMeaning
1EnglishheadThe part of the body of an animal or human which...
2English-yAdded to nouns and adjectives to form adjectives...
3Middle English-yDesignates an adjective, in many cases formed by...
4Old English-iġ-y, -ic
5Proto-West Germanic-gForms adjectives from nouns and verbs with a...
6Proto-Germanic-gaz-y
7Proto-Indo-European-ḱos-y, -ic

via English bonnet

StepLanguageWordMeaning
1EnglishbonnetA type of hat, once worn by women or children,...
2Middle Englishbonetcap, bonnet
3Middle Frenchbonet
4Old Frenchbonetmaterial from which hats are made
5Frankishbunnithat which is bound
6Proto-Germanicbundijąbundle
7Proto-Indo-Europeanbʰendʰ-to bind; bond
Every word from Proto-Indo-European -ḱos