[Facts] Jimena most likley of Arabic origin
Most likely of Arabic descent (Romanized as Xhimeena or Xhimina); it has the Arab feminine ending, and Spain had been heavily occupied by Moors and Arabs for several centuries up to the life and death of El Cid. It is highly reasonable to surmise that Jimena (especially when considering the gutteral "J" or "Xh" and the three consonant pattern) was passed on to women of Spanish descent - many "Spanish" words are Arabic in origin.
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Jimena could be of Arabic root
Yes it’s possible because it’s exactly same arabic girl name joumana I think it has arabic root
No, Jimena is the Spanish feminine form of Shimon ("Simon" in Hebrew). Which is not surprising since Jimena (as well as El Cid, in fact) had Jewish ancestors.