Douglas Graeme Hann
1908 Born in Aberdare, son of George Hann, mining engineer, and his wife Mary (nee Mary Ogilvie, born in Marylebone in 1881, daughter of Arthur Graeme Ogilvie)[1][2]
1911 Living in Merthyr Tydfil
1947 Director of British Heat Resis. Glass Co when he visited New York[3]
1989 Died in Shifnall[4]