🔼The name Ziim in the Bible
The name Ziim is probably not really a name. According to only the Young translation, a people named the Ziim is mentioned in Jeremiah 50:39, and Isaiah 13:21, 23:13 and 34:14. It's not clear why Young figures that only these four occurrences of the word ציים denote a people, and not the others.
🔼Etymology of the name Ziim
The "name" Ziim is a plural form of the noun צי (si), probably meaning desert-dweller:
Whether Ziim is a name or not, it probably literally means Desert-Dwellers or Desert-Creatures, but it is interpreted by various translations as: wild beasts (KJV in Isaiah 13:21 and 34:14 and Jeremiah 50:39) or even a curiously specific wild-cats (JSP, same verses).