Hmmm........... this is a tough one. I'd like to agree on fundo, scale weights, but the two circles are complete and do not open out at the edges, which would be an essential feature.
For this reason I temporarily reserve judgement.
丸に二曜紋 (Maru ni futa-yomon) is probably what it should be called if it existed, 'two celestial bodies in a circle', but the Yomon seem to start at three and go up to 9, i.e. (Kuyomon) 九曜文 and beyond. (Never as low as two?) 丸に二つ星紋 might also work, if you call these bodies 'hoshi' or 'stars'.
家紋二つ星紋 - 検索 画像 (bing.com)
My guess is that it's a later kamon made up following the end of the feudal era.