Robert Trefusis, 17th Baron Clinton

Robert George William Trefusis, 17th Baron Clinton (1764–1797) of Trefusis in Cornwall and Heanton Satchville, Petrockstowe in Devon, was an English peer.

In 1786 he married Albertina Marianna Gaulis (d.1798), daughter of Jean Abraham Rodolph Gaulis (d.1788) of Lausanne, Switzerland, an important magistrate of that city. He is described as "notaire juré, conseiller, secrétaire baillival, banneret de la Cité". In 1779 he resigned as "secrétaire baillival" after 40 years' service and requested that his son J. Juste Gaulis should succeed him, who had seconded for him during the last three years of his term. The request was successful as the son was appointed to the position in 1780. Her mother was Jeanne-Louise-Dorothée Porta, from another prominent Lausanne family. Her eldest brother was Abram Frederic Louis Juste Gaulis, a member of the Grand Council of Vaud and the heir and custodian of the Château de Colombier-sur-Morges, near Lausanne.

Among their children were:

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