What does Zayd mean?
From the root z-y-d (ز-ي-د, 'to increase, to grow, to add'), meaning 'growth, increase, abundance'. Borne by Zayd ibn Harithah, a companion and the adopted son of the Prophet. Also spelled Zaid.
What does Idris mean?
Traditionally linked by Arabic sources to the root d-r-s (د-ر-س, 'to study, to learn'), giving 'studious, learned'; another old interpretation is 'interpreter'. Many scholars regard the ultimate origin as non-Arabic, since Idris is the Quranic prophet traditionally identified with the Biblical Enoch. The meaning is therefore disputed.