Where does “matrilinear” come from?

matrilinear (English) comes from English linear, from Latin linearis, from Latin līnea, from Latin līnum, from Proto-Italic līnom, from Proto-Indo-European līnom — flax.

Ancestry of “matrilinear”, step by step

Step	Language	Word	Meaning
1	English	linear	Having the form of a line; straight or roughly...
2	Latin	linearis	consisting of lines, linear, lineal;...
3	Latin	līnea	A linen thread
4	Latin	līnum	flax
5	Proto-Italic	līnom	—
6	Proto-Indo-European	līnom	flax

Words derived from “matrilinear”

matrilinearism

Every word from Proto-Indo-European līnom →Every word from Proto-Italic līnom →Every word from Latin līnum →