The following names are said to be the same by some, and sometimes two or three of them are the same person, and the resources and dictionaries vary a lot. I read an article mentioning them, but I can't understand their take in the matter.

Any idea about those people? If they are the same, how? And if they are different, why many resources merge them as the same brothers?

• Muppim and Huppim (Ge 46:21): sons of Benjamin
• Shupham and Hupham (Nu 26:39): posterity of Benjamin
• Shuppim and Huppim (1Ch 7:12): sons of Ir
• Shephuphan and Huram (1Ch 8:5): sons of Bela