Well on my side it says "Unknown" so I think it's normal, it's supposed to say the name of the components yes, but I guess some ram memories just don't really want to display a name, because I searched for images and some say DDR3 but most I saw said Unknown.
so I still think it's normal for it to say Unknown or Other in your case, or it's simply not a bad thing to have. nothing to worry about, I suppose.