Arthur David Bergtheil
Arthur David Bergtheil, electrical engineer, of Berkeley and Young
1866 Born in London, twin brother of Edward Bergtheil, son of Jonas James Bergtheil, a South African merchant[1][2]
1890 Associate of IEE
1891 James Bergtheil 7, lived in Paddington, with Zipporah Bergtheil 64, Alice G Bergtheil 28 Arthur D Bergtheil 24, electrical engineer, Edward I Bergtheil 24, commission agent[3]
1894 Member of IEE
1915 "... Arthur David Bergtheil, of Townley House, West End-lane, Hampstead, and of Finsbury-court, Finsbury-pavement, both in the county of London, Electrical Engineer, a natural-born British subject, hereby give notice, that by a deed poll dated the 30th day of July, 1915, and enrolled at the Central Office of the Supreme Court on the 31st day of July, 1915, I formally renounced and abandoned the said surname of Bergtheil, and declared my intention of assuming from thenceforth, upon all occasions whatsoever, the name of Arthur David Berkeley instead of Arthur David Bergtheil, and so as to be at all times thereafter designated, known and described by the name of Arthur David Berkeley exclusively.[4].
1925 of Finsbury Pavement
1939 Arthur David Berkeley, Electrical Engineer, Chairman & Company Director, visiting Eastbourne, with Ethel M Berkeley[5]
1944 Arthur David Berkeley died in Edgbaston[6]