I don't see a particular African resemblance here. I would think these are more likely ancestral posts, from Indonesia. The color of the wood itself, the style of carving (especially those rounded, staring, pupil-less eyes), the prominent cheekbones, and the shape of the lips, all seem to be more characteristic of the Dayak, of Borneo (as is that distinctive knob on the head of the male figure.)
It may not be Dayak, specifically, but since there are so many tribal peoples in that area of the world, and most have a tradition of carving ancestral figures, often found in pairs, that at least is the area I would focus the research on.
Maybe 
