c. 1300, "value, worth," from Old French valor, valour "valor, moral worth, merit, courage, virtue" (12c.), from Late Latin valorem (nominative valor) "value, worth" (in Medieval Latin "strength, valor"), from stem of Latin valere "be strong, be worth" (from PIE root *wal- "to be strong"). The meaning "courage" is first recorded 1580s, from Italian valore, from the same Late Latin word. (The Middle English word also had a sense of "worth or worthiness in respect of manly qualities").
<a href="https://www.etymonline.com/word/valorous">Etymology of valorous by etymonline</a>
Harper, D. (n.d.). Etymology of valorous. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/valorous