It appears to me that the fabrics in this block are old. Possibly flour sacks. But what I really wanted to mention is that over the ages quilt patterns have be designed by people with a bit of imagination. This block could very well have been drawn by by the woman who sewed it.
I've got one pattern I designed for my own purpose. Very likely there's one quite similar somewhere. So, what I really wanted to say-----------don't sweat finding a name. Chart it for your records, name it after the woman who made it and enjoy.