The Haviland & de Havilland Heritage Society is a group of serious Haviland & de Havilland researchers and enthusiasts who study the surname, which may include family trees of Havilands not known to be related, and the lineage of all known descendants of Thomas de Haveilland of Guernsey of the 15th century.

The Haviland & de Havilland Heritage Society is a group of serious Haviland & de Havilland researchers and enthusiasts who study the surname, which may include family trees of Havilands not known to be related, and the lineage of all known descendants of Thomas de Haveilland of Guernsey of the 15th century.