Where does “otherworldness” come from?

otherworldness (English) comes from English Otherworld, from English other, from English kin, from English fictionkin, from English fiction, from Middle English ficcioun, from Old French ficcion, from Latin fictio — shoe.

Ancestry of “otherworldness”, step by step

otherworldness traces back through two separate lines of ancestry.

via English Otherworld

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

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Latin calceus