The first name Clydean is of American origin, derived from the surname Clyde, which has Scottish roots. It means 'from the riverbank,' referring to the River Clyde in Scotland. The name gained popularity in the United States during the early 20th century.
The name Clydean appears to have been relatively popular between 1920 and 1951, with a total of 74 babies being given this name during this period. The most popular years were 1931 and 1942, with eight and thirteen births respectively. However, the popularity of the name appears to have been inconsistent throughout these decades, with some years seeing as few as five births.