Where does “t'naisie” come from?

t'naisie (Norman) comes from Old French tanesie, from Latin tanacetum.

t'naisie (Norman): tansy; silverweed

Definitions

Step	Language	Word	Meaning
1	Old French	tanesie	—
2	Latin	tanacetum	—

t'naisie — Etymology, Origin & Word History | Etymology Explorer