Where does “fannishness” come from?

fannishness (English) comes from English fannish, from English Fan, from English fanatic, from French fanatique, from Latin fānāticus, from Latin -aticus, from Latin -ātus, from Proto-Italic -ātos — Forms adjectives from nouns, indicating the possession of a thing or a quality.

fannishness (English): The quality of being fannish; behaviour...

Definitions

  1. The quality of being fannish; behaviour...

Ancestry of “fannishness”, step by step

fannishness traces back through two separate lines of ancestry.

via English fannish

StepLanguageWordMeaning
1EnglishfannishOf or relating to a fan; characteristic of fandom
2EnglishFanA diminutive of Frances
3EnglishfanaticFanatical; Showing evidence of possession by a...
4Frenchfanatiquefanatic, fanatical; fanatic
5Latinfānāticustemple
6Latin-aticusUsed to form adjectives indicating a relation to...
7Latin-ātused
8Proto-Italic-ātos
9Proto-Indo-European-éh₂tosForms adjectives from nouns, indicating the possession of a thing or a quality

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 Proto-Indo-European -éh₂tosEvery word from Latin -ātusEvery word from Latin -aticus