Where does “Thainess” come from?

Thainess (English) comes from English Ness, from Middle English nesse, from Old English næs, from Proto-Germanic nasją, from Proto-Indo-European néh₂s — nose.

Thainess (English): The quality or state of being Thai

Definitions

  1. The quality or state of being Thai

Ancestry of “Thainess”, step by step

Thainess traces back through two separate lines of ancestry.

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

via English thai

StepLanguageWordMeaning
1EnglishthaiOf or pertaining to Thailand
2Thaiไทยperson; human being; Siamese person; Thai person
3Palideyyato be given
4Hindiदेयgiven
5Sanskritदेय॑
Every word from Proto-Indo-European néh₂sEvery word from Proto-Germanic nasjąEvery word from Old English næs