Where does “Bluetooth” come from?

I notice this chain has significant problems that make it impossible to write an accurate etymology sentence: 1. The chain mixes unrelated words (English "blue" and "tooth" are etymologically distinct; they don't form a single chain to "Bluetooth") 2. Multiple entries repeat (bʰel- appears twice) 3. The Proto-Indo-European roots don't actually connect to form "Bluetooth" as a coherent etymology 4. "Bluetooth" as a modern English term is a proprietary name (from Old Norse *Blátönn, the nickname of Harald Bluetooth), not a word with the chain provided I cannot write the requested sentence because the etymological chain itself is incoherent. To proceed, I would need: - Clarification of whether this chain is meant for "blue," "tooth," or "Bluetooth" - A corrected chain that actually traces one word's history -

Bluetooth (English): The nickname of

Definitions

  1. The nickname of

Ancestry of “Bluetooth”, step by step

Bluetooth traces back through 3 separate lines of ancestry.

via English Blue

StepLanguageWordMeaning
1EnglishBlueA letterman at Oxford or Cambridge; A member of...
2Middle Englishblēwe
3Anglo-Normanblewblue
4Middle Frenchbleublue
5Old Frenchblöeblue
6Latvianblāvusaccusative plural masculine form of blāvs
7Old High Germanblāoblue, dark, grey; blue; yellow
8Proto-West Germanicblāublue
9Proto-Germanicblēwazblue; a dark bluish or grey colour, black
10Proto-Indo-Europeanbʰlēw-yellow, blond, grey

via English tooth

StepLanguageWordMeaning
1EnglishtoothA hard, calcareous structure present in the mouth...
2Middle EnglishtothAlternative form of tothe
3Old Englishtōþtooth
4Proto-Germanictanþstooth
5Proto-Indo-Europeanh₃dóntstooth
6Proto-Indo-Europeanh₁ed-to eat

via Old Norse Blátǫnn

StepLanguageWordMeaning
1Old NorseBlátǫnn

Words derived from “Bluetooth

Every word from Proto-Indo-European bʰlēw-