English author of an educational treatise on proper training for the English nobility that is noteworthy for its insights into the educational goals and techniques of the 17th-century English upper classes. Gailhard seems to have spent a number of years as tutor abroad to “several of the nobility and gentry,” but nothing is really known of his life.

In his Compleat Gentleman (1678), Gailhard supported a broad curriculum, with the emphasis to be placed on education to develop character and noble bearing. In the second part of his two-part book, Gailhard detailed the educational advantages of foreign travel and prescribed a tutorial program for use abroad. He recommended prior knowledge of the native language, the keeping of a diary, regular religious devotions and Bible reading, physical exercise, and music. He suggested a three-year grand tour including stops at specific schools to learn the general principles of medicine and law.