which

Angliana

• (refers to a definite person or thing, sing., interrog. & rel.) qua;

(sing.; interrog. & rel.; used as an interrogative refers to something indefinite) quo.

of which - (referring to a single person or object) di qua;

(referring to several people or objects) di qui.

by which - …

(Vartanta traduko. Se vu konocas la signifiko en Ido, adjuntez ol.)