French painter and printmaker, probably identical with Jean Gueslart, painter and professor of the Académie de Saint-Luc in 1738. There is a considerably confusion between the various homonyms: both Jean-Baptiste Guélard and Antoine Guélard were active printmakers in Paris c. 1730-50. Jean-Baptiste published a lavishly illustrated 'Description abrégée des principeaux arts et métiers' (Paris, 1743). He engraved still-life pieces after Oudry. //