This page is historical. Follow this link for the current version.
Dictionary of Medieval Names
from European Sources

Ruby f. Middle English rubie from Old French rubi(s), rubïe 'ruby'.

Withycombe s.n. Ruby is incorrect when she calls it a modern coinage.

England
Early Modern English
1581 Ruby DEmar-vol2 p. 6
Cite as: S.L. Uckelman. "Ruby". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Ruby.