Where does “bagpack” come from?

bagpack (English) comes from English pack, from Middle English pakken, from Middle English -en, from Old English -en, from Old Norse -inn, from Proto-Norse -īna-, from Proto-Germanic -īnaz, from Proto-Indo-European -iHnos — adjectival suffix.

Ancestry of “bagpack”, step by step

bagpack traces back through two separate lines of ancestry.

via English pack

StepLanguageWordMeaning
1EnglishpackA bundle made up and prepared to be carried;...
2Middle EnglishpakkenTo pack; to put into a pack or container; To...
3Middle English-enDenotes the past participle form when attached to...
4Old English-enmæġþ + API → mæġden; cocc + API → cycen, cicen;...
5Old Norse-innUsed to create adjectives from nouns, meaning...
6Proto-Norse-īna-
7Proto-Germanic-īnaz-en
8Proto-Indo-European-iHnosCreates adjectives of materials
9Proto-Indo-European-no-adjectival suffix

via English bag

StepLanguageWordMeaning
1EnglishbagA flexible container made of cloth, paper,...
2Middle EnglishbaggeA fabric container; a bag, sack, pouch, purse, or...
3Old Norsebaggibag, pack, satchel, bundle
4Proto-Indo-Europeanbʰak-
Every word from Proto-Indo-European -no-Every word from Middle English -enEvery word from Proto-Germanic -īnaz