Lord or master
Derived from the Arabic title 'al-sid', meaning lord or master. It became famous through the 11th-century Castilian military leader Rodrigo Díaz de Vivar, known as El Cid, whose life inspired epic poetry and legends.
About 7 boys were named Cid in 2025.
Castilian military leader and national hero of Spain
Airship pilot and recurring character archetype · Final Fantasy series
Protagonist of the light novel series · The Eminence in Shadow
US births per 5-year period, 1990–present (SSA data).