"Variant of Lydia"
The name Lydian is commonly a female name from the "Swedish" origin.
Lydian is the English adjective formed from Lydia, the name of an ancient kingdom in western Asia Minor, and it is also the name of one of the modes of ancient Greek music. As a given name it is a longer form of Lydia, itself a documented Greek personal name. The two are distinct entries: Lydia is the older name, and Lydian is the derived adjective used as a name.
Lydia means "Beautiful, Womanly.".
The pronunciation of Lydian is LID-ee-un.