Where does “Latinness” come from?

Latinness (English) comes from English Latin, from Middle English Latyn, from Old French latin, from Latin Latīnus, from Latin -īnus, from Proto-Italic -īnos, from Proto-Indo-European -iHnos, from Proto-Indo-European -no- — adjectival suffix.

Latinness (English): The state, quality, or condition of Latin or of being Latin; Latinity

Definitions

  1. The state, quality, or condition of Latin or of being Latin; Latinity

Ancestry of “Latinness”, step by step

Latinness traces back through two separate lines of ancestry.

via English Latin

StepLanguageWordMeaning
1EnglishLatinOf or relating to the language spoken in ancient...
2Middle EnglishLatynRelating to the Latin language; Relating to the...
3Old FrenchlatinLatin language
4LatinLatīnusLatin; of or pertaining to Latium, the Latin language, people, or culture
5Latin-īnusof or pertaining to; -ine
6Proto-Italic-īnosof/belonging to
7Proto-Indo-European-iHnosCreates adjectives of materials
8Proto-Indo-European-no-adjectival suffix

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 -no-Every word from Latin -īnusEvery word from Latin Latīnus