John Loudon McAdam (1756–1836), Scottish inventor of the Macadam Road Surface
John Loudon McAdam (1756–1836), Scottish engineer noted for inventing the process of "macadamization" of roads
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Her father was Raoul Hafner, an Austrian helicopter pioneer, and her mother Eileen Myra McAdam was a descendant of John Loudon McAdam, the road builder.