Hi, I am helping someone who has a great great grandfather named George Yemm (married to Ann Walding) who died before 1881. I have estimated his birth as 1838 in Blackeney, Gloucestershire. My friend descends from his son William H Yemm, b ca. 1870 in Bream and was a coal hewer as was his son William George Yemm (1891-1962). The latter's son was Ivor Roy Yemm who immigrated to the USA. Sounds as if you are from the same family.