Caidin is an uncommon, unisex given name of modern origin. It is believed to have been created by author Orson Scott Card for his daughter, who was born in 1983. The name's meaning and etymology are unclear, as it appears to be a unique invention. Caidin gained some popularity following the release of Card's novel "Ender's Game," which featured a character named Caiden. However, it remains relatively rare, with few people sharing this distinctive name. In recent years, it has been more commonly used for boys than girls, though it is still considered unisex. Despite its unusual origin and spelling, Caidin has a certain appeal due to its uniqueness and lack of traditional meaning, allowing those who bear it to create their own personal significance associated with the name.
The name Caidin experienced varying popularity between 2000 and 2021, with peaks in 2006, 2007, and 2009, and a total of 96 births during this period.