Rodrigo 'el Cid' Díaz de Vivar, príncipe de Valencia is Umar al-Farooq Ibnu Khattab (Amirul Mu'minin) عُمَرْ بِنْ ٱلْخَطَّابْ's daughter's husband's third great grandson's wife's brother's wife's nephew's wife's great niece's husband.
They might be connected in other ways.
