Where does “motherkin” come from?

motherkin (English) comes from English kin, from English fictionkin, from English fiction, from Middle English ficcioun, from Old French ficcion, from Latin fictio, from Latin -tiō, from Latin dissertātiō — small stone, pebble; gravel, rubble.

Definitions

Ancestry of “motherkin”, step by step

motherkin traces back through two separate lines of ancestry.

via English kin

StepLanguageWordMeaning
1EnglishkinRace; family; breed; kind; Persons of the same...
2EnglishfictionkinAn individual whose personal identity is based in fiction of some kind: a fictional character, a fictional race or species, etc
3EnglishfictionLiterary type using invented or imaginative...
4Middle EnglishficciounAn invention or fabrication
5Old Frenchficciondissimulation, ruse, invention
6Latinfictiofashioning, forming, formation; fiction
7Latin-tiōtion, -ation, -ing
8Latindissertātiō(spoken) dissertation, discourse, disquisition
9Latindissertusarranged, disposed; explained
10Latindissereresecond-person singular future passive indicative...
11Latindis-asunder, apart, in two; reversal, removal;...
12Latincalceusshoe
13Latincalxlimestone; chalk; the finish line
14Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via English mother

StepLanguageWordMeaning
1EnglishmotherA female who has given birth to a baby; A human...
2Middle Englishmodrenplural of moder
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
Every word from Ancient Greek χάλιξEvery word from Latin -tiōEvery word from Latin dis-