I was a weaver for 15 years. I have woven one like this in the same colors. There are two patterns that can be done on the same threading: Lover's Knot and Whig Rose. I used to remember which was which. If the small motif (4 in each repeat) is touching the edge then that is Lover's Knot. This one is Whig Rose.
The pattern is pre colonial (I think) but the only way to tell is to have the fibers examined. Most old looms were only 30 inches wide, so this pattern had to be made in two panels and then carefully sewn together. If there was one weaver and the weaver did not change moods while making this, the two panels should fit together. If something happy or sad or bad happened when you were weaving it, your mood would be reflected in the beat of the loom and the pattern would be off.
I have sold my weaving business, looms and all. I think I still have one or two coverlets that were not sold. The traditional way is to have a cotton back ground and a wool pattern ( blue). I made just a handful of coverlets and one that didn't match I had made into teddy bears. The seamstress for the bears was quite skilled and made little matching clothes for them complete with jewelry. They sold easily.
I'll try to get a pic of the coverlet I still have. Marcia