El Cid (Spanish) comes from Spanish Cid, from Arabic سَيِّد, from Persian جان, from Middle Persian yʾn', from Proto-Iranian *wyaHnáH, from Proto-Indo-Iranian wyaHnás, from Proto-Indo-European h₂enh₁‑ — to breathe.
Ancestry of “El Cid”, step by step
El Cid traces back through two separate lines of ancestry.