The real Gordon Lonsdale
A person by the name of Gordon Arnold Lonsdale was born on 27 August 1924 in Cobalt, Ontario, Canada. His father was a miner, Emmanuel Jack Lonsdale, and his mother was Olga Elina Bousa, an immigrant from Finland. The Lonsdales were separated in 1931 and a year later, Olga took her son with her back to her native Finland. It is presumed that he died c. 1943 and that his papers were obtained by the Soviets for use by their agents.
There is some doubt that the Lonsdale born in Cobalt in 1924 was the Lonsdale arrested in London in 1961: the former had been circumcised, the latter was not.