Where does “grandchild” come from?

I appreciate the task, but I notice a critical issue: the etymological chain provided doesn't support "grandchild" at all. The chain traces roots like "gelt-" and "gel-" which don't connect to "grand" or "child" in any standard etymology. To write an accurate one-sentence origin summary, I would need a correct etymological chain for "grandchild" that shows how it actually derives from its source languages. Could you provide the correct chain, or did you mean to ask about a different headword?

grandchild (English): A child of someone's child

Definitions

  1. A child of someone's child

Ancestry of “grandchild”, step by step

StepLanguageWordMeaning
1EnglishChildAlternative letter-case form of child "often used...
2Middle EnglishchildenTo deliver a child; to beget or procreate; 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

Words derived from “grandchild

Every word from Proto-Indo-European -no-Every word from Middle English -enEvery word from Proto-Germanic -īnaz